臺灣博碩士論文加值系統

利用固態反應法使用不同燒結溫度製作出5% Co-doped BFO與10% Co-doped BFO陶瓷，在XRD圖譜呈現單一晶相性，從掃描式電子顯微鏡得知，燒結溫度的提升會使陶瓷粒徑增長，隨Co的比例增加，晶粒形狀從圓形轉變成矩形，並且在室溫下表現出鐵磁性。從變溫之介電常數分析，發現在高溫之介電常數，表現出明顯的頻率色散與離子傳導效應。光伏效應量測以厚度為0.2 mm之Co-doped BFO 樣品，上電極與下電極分別鍍上ITO薄膜與Au薄膜，形成ITO film/ Co-doped BFO ceramic/Au film系統，並選用405 nm二極體雷射照射量測在不同的光照強度下所產生的斷路電壓與短路電流，可以使用本實驗室所發展的BFO陶瓷光伏效應理論解釋，陶瓷粒徑與外加3000 Oe磁場可以影響光伏效應的斷路電壓與短路電流密度，兩者影響光伏效應皆可用指數函數擬合與描述，式子為Voc = Vb[1-exp(I/α)]與Jsc = Jb [1-exp(I/β)]，其中Voc、Vb、Jsc與Jb分別代表斷路電壓、飽和斷路電壓、短路電流密度、飽和短路電流密度。

In this research, 5% and 10% Co-doped BFO multiferroic ceramics have been synthesized by solid state reaction (SSR) method with various sintering temperature and present single phase in XRD measurements. The average grain size of Co-doped BFO observed by SEM grows significantly as increasing sintering temperature. The ferromagnetic behavior at room temperature is enhanced as cobalt doped in BFO and grains demonstrate more rectangle shape with increasing Co content. The temperature- and frequency- dependent dielectric permittivity of Co-doped BFO show strong frequency dispersion and high electric conductivity around 250 oC. For photovoltaic (PV) effects measurement, the ITO and Au films were deposited on both sides of Co-doped BFO and the thickness of BFO is 0.2 mm. The diode laser of λ = 405 nm was used as an excitation source to measure open circuit voltage and short circuit current density. The photovoltaic phenomena can be explained by the developed model which is based on p-n junction concepts. On the other hand, the photovoltaic responses also depend on the average grain size and an application of magnetic field~3000 Oe. The relation between photovoltaic response and light intensity can be described by exponential equations Voc = Vb[1-exp(I/α)] and Jsc = Jb [1-exp(I/β)], where Voc, Jsc, Vb, and Jb are open-circuit voltage, short- circuit current density , saturated open-circuit voltage, and saturated short-circuit current density, respectively.

中文摘要...................................i
Abstract.................................ii
致謝.....................................iii
目錄......................................iv
圖目錄....................................vii
表目錄.....................................xi
第一章 緒論..................................1
1.1 複鐵性材料...............................1
1.2 BiFeO3與B-site離子取代效應................2
1.2.1 過渡金屬元素鈷在鈣鈦礦結構扮演的角色........5
1.2.2 Bi(Fe1-xCox)O3的結構相變與磁性..........6
1.3 文獻回顧.................................8
1.4 研究動機.................................9
第二章 實驗理論..............................10
2.1 介電常數理論.............................10
2.2 光伏效應原理.............................11
2.3 磁性原理................................17
2.4 磁域與磁滯曲線...........................18
第三章 樣品製備與實驗方法......................21
3.1 樣品製備................................22
3.1.1 Co-doped BFO之調配與球磨...............22
3.1.2 鍛燒.................................24
3.1.3 高能球磨..............................25
3.1.4 成型.................................26
3.1.5 燒結.................................26
3.2 變溫介電常數量測.........................30
3.3 光伏效應量測............................30
3.3.1 樣品製備.............................30
3.3.2 斷路電壓與短路電流量測 ..................31
3.3.3 I-V曲線與轉換效率......................31
3.3.4 外加磁場調控光伏效應量測.................33
3.4 磁性量測................................34
第四章 實驗結果與討論.........................35
4.1 SEM表面型態分析..........................35
4.2 磁性量測分析.............................39
4.3 變溫介電常數析............................40
4.4 光伏效應量測結果與分析......................44
4.4.1 陶瓷粒徑對於光伏效應之影響分析..............44
4.4.2 外加磁場調控光伏效應分析...................66
第五章 結論....................................72
參考文獻.......................................75

[1] Nicola A. Spaldin and Manfred Fiebig, “The Renaissance of Magnetoelectric Multiferroics”, Science 309, 391-392(2005)
[2] N. A. Spaldin, S.-W. Cheong, and R. Ramesh,“Multiferroics:
Past, present, and future”, Physics Today 63, 38-43 (2010).
[3] T. Kimura, T. Goto, H. Shintani, K. Ishizaka, T. Arima, and Y. Tokura, “Magnetic control of ferroelectric polarization”, Nature, 426, 55-58 (2003)
[4] M. Fiebig, Th. Lottermoser, D. Frohlich, A. V. Goltsev and R. V. Pisarev, “Observation of coupled magnetic and electric domains”, Nature 419, 818-820 (2002)
[5] T. Kimura, S. Kawamoto, I. Yamada, M. Azuma, M. Takano, and Y. Tokura1, “Magnetocapacitance effect in multiferroic BiMnO3”, Phys. Rev. B 67, 180401(R) (2003).
[6] J. Wang, J. B. Neaton, H. Zheng, V. Nagarajan, S. B. Ogale, B. Liu, D.Viehland, V. Vaithyanathan, D. G. Schlom, U. V. Waghmare, N. A. Spaldin,　K.M. Rabe, M. Wuttig, and R.Ramesh, “Epitaxial BiFeO3 Multiferroic Thin Film Heterostructures”, Science 299, 1719-1722 (2003)
[7] J. M. Moreau, C. Michel, R. Gerson, and W. J. James, “Ferroelectric BiFeO3 X-ray and neutron diffraction study”, J. Phys. Chem. Solids 32, 1315-1320 (1971)
[8] R.Mazumder, S. Ghosh, P. Mondal, Dipten Bhattacharya, S. Dasgupta, N. Das, A. Sen, A.K. Tyagi, M. Sivakumar, T. Takami, and H. Ikuta, “Particle size dependence of magnetization and phase transition near TN in multiferroic BiFeO3”, J. Appl. Phys. 100, 033908(2006)
[9] Jhih-Cyun Chen and Jenn-Ming Wu , “Dielectric properties and ac conductivities of dense single-phased BiFeO3 ceramics”, Appl. Phys. Lett. 91, 182903 (2007)
[10] D. Lebeugle, D. Colson, A. Forget, M. Viret, P. Bonville, J. F. Marucco, and S. Fusil, “Room-temperature coexistence of large electric polarization and magnetic order in BiFeO3 single crystals”, Phys. Rev. B. 76, 024116 (2007).
[11] F. Kubel and H. Schmid, “Structure of a ferroelectric and ferroelastic monodomain crystal of the perovskite BiFeO3” Acta Crystallogr., Sect. B: Structure Science 46, 698 (1990).
[12] C. Ederer and N. A. Spaldin, “Weak ferromagnetism and magnetoelectric coupling in bismuth ferrite”, Phys. Rev. B 71, 060401(R) (2005).
[13] M. Cazayous, Y. Gallais, A. Sacuto, R. de Sousa, D. Lebeugle and D. Colson, “Possible Observation of Cycloidal Electromagnons in BiFeO3”, Phys. Rev. Lett. 101, 037601 (2008).
[14] I Sosnowskat, T Peterlin-Neumaier and E Steichele, “Spiral magnetic ordering in bismuth ferrite”, J. Phys. C, 15, 4835 (1982).
[15] 楊偉群, “複鐵性 BiFeO3陶瓷 A-site 離子置換之效應”, 天主教輔仁大學物理學系碩士論文 (2011).
[16] Claude Ederer and Nicola A. Spaldin, “Influence of strain and oxygen vacancies on the magnetoelectric properties of multiferroic bismuth ferrite”, Phys. Rev. B. 71, 224103 (2005).
[17] Y. P. Wang, G. L. Yuan, X. Y. Chen, J.-M. Liu and Z. G. Liu, “Electrical and magnetic properties of single-phased and highly resistive ferroelectromagnet BiFeO3 ceramic”, J. Phys. D: Appl. Phys. 39 (2006) 2019–2023.
[18] Y. P. Wang, L. Zhou, M. F. Zhang, X. Y. Chen, J.-M. Liu, and Z. G. Liu, “Room-temperature saturated ferroelectric polarization in BiFeO3 ceramics synthesized by rapid liquid phase sintering”, Appl. Phys. Lett. 84, 1731 (2004).
[19] G. L. Yuan and Siu Wing Or, “Enhanced piezoelectric and pyrpelectric effects in single-phase multiferroic Bi1-xNdxFeO3 (x = 0- 0.15) ceramics”, Appl. Phys. Lett. 88, 062905 (2006).
[20] Z.X. Cheng, A.H. Li, X.L. Wang, S.X. Dou, K. Ozawa, H. Kimura,
S.J. Zhang, and T.R.Shrout, “Structure, ferroelectric properties, and
magnetic properties of the La-doped bismuth ferrite “, J. Appl. Phys.
103, 07E507 (2008).
[21] Yi Du, Zhen Xiang Cheng, Mahboobeh Shahbazi, Edward W. Collings, Shi Xue Dou, and Xiao Lin Wang, “Enhancement of ferromagnetic and dielectric properties in lanthanum doped BiFeO3 by hydrothermal synthesis”, Journal of Alloys and Compounds 490, 637–641 (2010).
[22] R.K. Mishra , Dillip K. Pradhan, R.N.P. Choudhary, and A. Banerjee, “Dipolar and magnetic ordering in Nd-modified BiFeO3 nanoceramics”, Journal of Magnetism and Magnetic Materials. 320, 2602– 2607 (2008).
[23] Masaki Azuma, Hironori Kanda, Alexei A. Belik, Yuichi Shimakawa, and Mikio Takano, “Magnetic and structural properties of Bi Fe 1-x Mn x O 3”, Journal of Magnetism and Magnetic Materials 310 (2007) 1177–1179.
[24] Qingyu Xu, Haifa Zai, D. Wu, T. Qiu, and M. X. Xu “The magnetic properties of Bi(Fe0.95Co0.05)O3 ceramics”, Appl. Phys. Lett. 95, 112510 (2009).
[25] Dillip K. Pradhan, R. N. P. Choudhary, C. Rinaldi, and R. S. Katiyar, “Effect of Mn substitution on electrical and magnetic properties of Bi0.9La0.1FeO3”, J. Appl. Phys. 106, 024102 (2009).
[26] S. Y. Wang, W. F. Liu, J. Gao, Xue Qiu, Yu Feng et al., “Resistive switching and threshold switching behaviors in La0.1Bi0.9Fe1−xCoxO3 ceramics”, J. Appl. Phys. 112, 034110 (2012).
[27] Hiroshi Naganuma, Jun Miura, and Soichiro Okamura, “Ferroelectric, electrical and magnetic properties of Cr, Mn, Co, Ni, Cu added polycrystalline BiFeO3 films”, Appl. Phys. Lett. 93, 052901 (2008).
[28] P Kharel, S Talebi, B Ramachandran, A Dixit, V M Naik, M B Sahana, C Sudakar, R Naik, M S R Rao, and G Lawes, “Structural, magnetic, and electrical studies on polycrystalline transition-metal-doped BiFeO3 thin films”, J. Phys.: Condens. Matter 21 (2009) 036001 (6pp).
[29] V. R. Singh, V. K. Verma, K. Ishigami, G. Shibata, Y. Yamazaki, A. Fujimori, Y. Takeda, T. Okane, Y. Saitoh, H. Yamagami, Y. Nakamura, M. Azuma, and Y. Shimakawa, “Enhanced ferromagnetic moment in Co-doped BiFeO3 thin films studied by soft x-ray circular dichroism”, J. Appl. Phys. 114, 103905 (2013).
[30] John B. Goodenough, “An interpretation of the magnetic properties of the perovskite-type mixed crystals La1-xSrxCoO3-λ” J. Phys. Chem. Solids 6, pp. 287-297 (1958).
[31] R. R. Herikes, R. C. Miller, and R. Mazelsky, “Magnetic and electrical anomalies in LaCoO3”, Physica 30, 1600-1608 (1964).
[32] S. Yamaguchi, Y. Okimoto, H. Taniguchi, and Y. Tokura, “Spin-state transition and high-spin polarons in LaCoO3” Phys. Rev. B 53, No.6 (1996).
[33] M. Abbate, J. C. Fuggle, A. Fujimori, L. H. Tjeng, C. T. Chen, R. Potze, G. A. Sawatzky, H. Eisaki and S. Uchida, “Electronic structure and spin-state transition of LaCoO3”, Phys. Rev. B 47, No. 24 (1993)
[34] M. A. Korotin, S. Yu. Ezhov, I. V. Solovyev, and V. I. Anisimov, “Intermediate-spin state and properties of LaCoO3”, Phys. Rev. B 54, No. 8 (1996).
[35] M. W. Haverkort, Z. Hu, J. C. Cezar, T. Burnus, H. Hartmann, M. Reuther, C. Zobel, T. Lorenz, A. Tanaka, N. B. Brookes, H. H. Hsieh, H.-J. Lin, C. T. Chen, and L. H. Tjeng, “Spin State Transition in LaCoO3 Studied Using Soft X-ray Absorption Spectroscopy and Magnetic Circular Dichroism”, Phys. Rev. Lett. 97, 176405 (2006).
[36] Hiroshi Naganuma, Nozomi Shimura, Jun Miura, Hiromi Shima, Shintaro Yasui, Ken Nishida, Takashi Katoda, Takashi Iijima, Hiroshi Funakubo, and Soichiro Okamura, “Enhancement of ferroelectric and magnetic properties in BiFeO3 films by smallamount of cobalt addition”, J. Appl. Phys. 103, 07E314 (2008).
[37] Masaki AZUMA, Seiji NIITAKA , Naoaki HAYASHI, Kengo OKA, Mikio TAKANO, Hiroshi FUNAKUBO, and Yuichi SHIMAKAWA, “Rhombohedral–Tetragonal Phase Boundary with High Curie Temperature in (1-x)BiCoO3 –xBiFeO3 Solid Solution”, Jpn. J. Appl. Phys. 47, No. 9 (2008).
[38] Yonggang Wang, Gang Xu, Linlin Yang, Zhaohui Ren, Xiao Wei, Wenjian Weng, Piyi Du, Ge Shen, Gaorong Han, “Enhanced ferro- magnetic properties of multiferroic BiCoxFe1− xO3 synthesized by
hydrothermal method”, Materials Letters 62 (2008) 3806–3808.
[39] Makoto Kubota, Kengo Oka, Hisato Yabuta, Kaoru Miura, and Masaki Azuma, “Structure and Magnetic Properties of BiFe1-xCoxO3 and Bi0.9Sm0.1Fe1-xCoxO3”, Inorg. Chem. 52, 10698-10704 (2013).
[40] Sang-Hyun Kim, Hyunwoo Choi, Kwangsoo No and Sung-Chul Shin, “Electric-field induced ferromagnetic domain changes in exchange biased Co–BiFeO3 composite”, J. Phys. D: Appl. Phys. 43 (2010) 165001 (5pp).
[41] T. Choi, S. Lee, Y. J. Choi, V. Kiryukhin, S.-W. Cheong, “Switchable Ferroelectric Diode and Photovoltaic Effect in BiFeO3”, Science 324, 63 (2009).
[42] W. Ji, K. Yao, and Y. C. Liang, “Bulk Photovoltaic Effect at Visible
Wavelength in Epitaxial Ferroelectric BiFeO3 Thin Films”, Adv.
Mater. 22, 1763 (2010).
[43] S. Y. Yang, L. W. Martin, S. J. Byrnes, T. E. Conry, S. R. Basu,D. Paran, L. Reichertz, J. Ihlefeld, C. Adamo, A. Melville, Y.-H. Chu, C.-H. Yang, J. L. Musfeldt, D. G. Schlom, J. W. Ager III,
and R. Ramesh, “Photovoltaic effects in BiFeO3”, Appl. Phys. Lett. 92, 222901 (2008).
[44] Can Wang, Kui-juan Jin, Zhong-tang Xu, Le Wang, Chen Ge, Hui-bin Lu, Hai-zhong Guo, Meng He, and Guo-zhen Yang, “Switchable diode effect and ferroelectric resistive switching in epitaxial BiFeO3 thin films”, Appl. Phys. Lett. 98, 192901 (2011).
[45] H. T. Yi, T. Choi, S. G. Choi, Y. S. Oh, and S.-W. Cheong, “Mechanism of the Switchable Photovoltaic Effect in Ferroelectric BiFeO3”, Adv. Mater. 23, 3403-3407 (2011).
[46] B. Kundys, M. Viret, D. Colson, and D. O. Kundys, “Light induced size changes in BiFeO3 crystals”, Nature, 9, 803-805 (2010).
[47] C.-M. Hung, M.-D. Jiang, J. Anthoninappen, and C.-S. Tu, “Photo- induced electric phenomena in antiferromagnetic BiFeO3 ceramics”, J. Appl. Phys. 113, 17D905 (2013).
[48] C-S Tu, C-M Hung, V H Schmidt, R R Chien, M-D Jiang and J. Anthoninappen, “The origin of photovoltaic responses in BiFeO3 multiferroic ceramics”, J. Phys. Condens. Matter 24, 495902 (2012).
[49] C. S. Tu, C.-M. Hung, Z.-R. Xu, V. H. Schmidt, Y. Ting, R. R. Chien, Y.-T. Peng, and J. Anthoninappen, “Calcium-doping effects on photovoltaic response and structure in multiferroic BiFeO3 ceramics”, J. Appl. Phys. 114, 124105 (2013).
[50] 林灯祺, “複鐵性BiFeO3 陶瓷之結構相變與摻BaTiO3效應”, 天主教輔仁大學物理學系碩士論文 (2011).
[51] S. Y. Yang, J. Seidel, S. J. Byrnes, P. Shafer, C.-H. Yang, M. D. Rossell, P. Yu, Y.-H. Chu, J. F. Scott, J. W. Ager, III, L. W. Martin, and R. Ramesh, “Above-band gap voltages from ferroelectric photovoltaic devices”, Nature Nanotechnology 5, 143-147 (2010).
[52] S. J. Clark and J. Robertson, “Band gap and Schottky barrier heights of multiferroic BiFeO3”, Appl. Phys. Lett. 90, 132903 (2007).
[53] S. R. Basu, L. W. Martin, Y. H. Chu, M. Gajek, R. Ramesh, R. C. Rai, X. Xu, and J. L. Musfeldt, “ Photoconductivity in BiFeO3 thin films”, Appl. Phys. Lett. 92, 091905 (2008).
[54] 李永強, “含鐵之磁性奈米粒在細胞標示上的研究”, 國立中正大學物理研究所碩士論文 (2004).
[55] S. O. Kasap, “Principle of Electronic Materials and Device”, 3rd ed. Mc Graw Hill.
[56] Z. M. Tian, S. L. Yuan, X. L. Wang, X. F. Zheng, S. Y. Yin, C. H. Wang, and L. Liu, “ Size effect on magnetic and ferroelectric properties in Bi2Fe4O9 multiferroic ceramics”, J. Appl. Phys. 106, 103912 (2009).
[57] 杜浩群, “光致電效應在複鐵陶瓷 BiFeO3”,天主教輔仁大學物理學系碩士論文 (2011).
[58] T.A. Roth, “The surface and grain boundary energies of iron, cobalt
and nickel”, Materials Science and Engineering 18, 183–192(1975).
[59] Barsoum, “Fundamentals of Ceramics”, McGraw-Hill (2000).
[60] Pornchanok Lawita, Pasinee Siriprapa, Anucha Watcharapasorn, and Sukanda Jiansirisomboon, “Effects of Nd and Co co-doping on phase, microstructure and ferromagnetic properties of bismuth ferrite ceramics”, Ceramics International 39, S253-S256 (2013).
[61] Indrani Coondoo, Neeraj Panwar, Amit Tomar, Igor Bdikin, A.L. Kholkin, Venkata S. Puli, Ram S. Katiyar, “Improved magnetic and piezoresopnse behavior of cobalt substituted BiFeO3 thin film” Thin Solid Films 520, 6493-6498 (2012).
[62] Y. Ding, T.-H. Wang, W.-C. Yang, T.-C. Lin, C.-S. Tu, Y.-D. Yao, and K.-T. Wu, “Magnetization, Magnetoelectric Effect, and Structure Transition in BiFeO3 and (Bi0.95La0.05)FeO3 Multiferroic Ceramics”, IEEE Transactions on magnetics, Vol. 47, No. 3, March 2011.
[63] Xiaohong Zheng, Qingyu Xu, Zheng Wen, Xianzhong Lang, D. Wu, T. Qiu, M. X. Xu, “The magnetic properties of La doped and co-doped BiFeO3”, J. Alloys Compd. 499 (2010) 108.
[64] Izabela Sosnowska, Masaki Azuma, Rados.aw Przenioslo, Dariusz Wardecki, Wei-tin Chen, Kengo Oka, and Yuichi Shimakawa, “Crystal and Magnetic Structure in Co-Substituted BiFeO3”, Inorg. Chem. 52 (22), 13269-13277 (2013).
[65] C.-S. Tu, W.-C. Yang, V. H. Schmidt, and R. R. Chien, “Origins of dielectric response and conductivity in (Bi1-xNdx)FeO3 multiferroic ceramics”, J. Appl. Phys. 110, 114114 (2011).
[66] Z. Abdelkafi, N. Abdelmoula, H. Khemakhem, O. Bidault, and M. Maglione, “Dielectric relaxation in BaTi0.85(Fe1/2Nb1/2)0.15O3 perovskite ceramic”, J. Appl. Phys. Lett. 100, 114111 (2006).
[67] Kaushik Chakrabarti, Kajari Das, Babusona Sarkar, Sirshendu Ghosh, S. K. De, Godhuli Sinha, and J. Lahtinen, “Enhanced magnetic and dielectric properties of Eu and Co co-doped BiFeO3 nanoparticles”, Appl. Phys. Lett. 101, 042401 (2012).
[68] Partri Tirupathi, and Amreesh Chandra, “Grain and grain boundary effects in Ca2+ doped BiFeO3 multiferroic ceramics”, Phys. Status Solid B 249, No. 8, 1639-1645 (2012).
[69] A. K. Pradhan,, Kai Zhang, D. Hunter, J. B. Dadson, G. B. Loutts, P. Bhattacharya, R. Katiyar, Jun Zhang, D. J. Sellmyer, U. N. Roy, Y. Cui, and A. Burger, “Magnetic and electrical properties of single- phase multiferroic BiFeO3”, J. Appl. Phys. 97, 093903 (2005).
[70] A. M. Glass, D. von der Linde, and T. J. Negran, “Highvoltage bulk photovoltaic effect and the photorefractive process in LiNbO3”, Appl. Phys. Lett. 25, 233 (1974).
[71] C.-M. Hung, C.-S. Tu, W. D. Yen, L. S. Jou, M.-D. Jiang, and V. H. Schmidt, “Photovoltaic phenomena in BiFeO3 multiferroic ceramics”, J. Appl. Phys. 111, 07D912 (2012).
[72] Iris Visoly-Fisher, Sindeny R. Cohen, Konstantin Gartsman, Arie Ruzin, and David Cahen, “Understanding the Beneficial Role of Grain Boundaries in Polycrystalline Solar Cells from Single-Grain- Boundary Scanning Probe Microscopy”, Adv. Funct. Mater. 16, 649-660 (2006).
[73] John Y. W. Seto, “The electric properties of polycrystalline silicon films”, J. Appl. Phys. 46, 5247 (1975).
[74] Philip S. Brody and Frank Crowne, “Mechanism for the high voltage photovoltaic effect in ceramic ferroelectrics”, Journal of Electronic Materials, Vol. 4, No. 5, 1975.
[75] P. S. Brody, “High Voltage Photovoltaic Effect in Barium Titanate and Lead Titanate-Lead Zirconate Ceramics”, Journal of Solid State Chemistry 12, 193-200 (1975).
[76] Kenta Takagi, Shoko Kikuchi, Jing-Feng Li, Hiroshi Okamura, Ryuzo Watanabe, and Akira Kawasaki, “Ferroelectric and Photostrictive Properties of Fined-Grained PLZT Ceramics Derived from Mechanical Alloying”, J. Am. Ceram. Soc., 87 1477-1482 (2004)
[77] Kohjiro Hara, Takaro Horiguchi, Tohru Kinoshita, Kazuhiro Sayama, Hideki Sugihara, Hironori Arakawa, “Highly efficient photon-to- electron conversion with mercurochrome-sensitized nanoporous oxide semiconductor solar cells”, Solar Energy Materials & Solar Cells 64, 115-134 (2000).
[78] Wendy U. Huynh, Janke J. Dittmer, Nerayo Teclemariam, Delia J. Milliron, and A. Paul Alivisatos, and Keith W. J. Barnham, “Charge transport in hybrid nanorod-polymer composite photovoltaic cells”, Phys. Rev. B 67, 115326 (2003).
[79] M. Saad, H. Riazi, E. Bucher, M. Ch. Lux-Steiner, “CuGaSe2 solar cells with 9.7% power conversion efficiency”, Appl. Phys. A 62, 181-185 (1996)
[80] S. Wong and P. Becla, “The magnetic field influence on the photo -voltaic effect in Mn alloyed semiconductors”, J. Vac. Sci. Technol. A 4, 2019 (1986).
[81] J. K. Furdyna, “Electrical, optical, magnetic properties of Hg1-xMnx Te”, J. Vac. Sci. Technol. 21, 220 (1982).