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研究生:楊水源
研究生(外文):Shui-Yuang Yang
論文名稱:非平面與平面太陽電池之電路模型研究
論文名稱(外文):SPICE model study of non-planar and planar Solar cells
指導教授:林中一林中一引用關係
口試委員:林楚軒李敏鴻張志軍
口試日期:2015-07-16
學位類別:博士
校院名稱:國立中興大學
系所名稱:物理學系所
學門:自然科學學門
學類:物理學類
論文種類:學術論文
論文出版年:2015
畢業學年度:103
語文別:英文
論文頁數:104
中文關鍵詞:鰭式太陽電池多出少數載子光電流密度理想二極體電流密度短路電流密度開路電壓填充因數轉換效率平面型太陽電池徑型太陽電池。
外文關鍵詞:fin-shaped solar cellexcess minority-carrierphotocurrent densityideal diode current densityshort-circuit current densityopen-circuit voltagefill factorefficiencyplanar solar cellradial pn-junction solar cell.
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本篇論文中,提出一新穎的鰭式太陽電池結構設計,討論其元件物理理論及建立數學模型,藉由多出少數載子傳輸方程來推導太陽電池在n型中性區及p型中性區之多出少數載子分佈,透過擴散原理,進而求得在中性區光電流密度與理想二極體電流密度。空乏區內之光產生電流密度與電子電洞結合電流密度是利用電子電洞產生率及Shockley-Read-Hall 結合理論得到。我們接著探討了鰭式太陽電池之短路電流密度,開路電壓,填充因數及轉換效率並與平面型及徑型太陽電池的比較,在p型部分寬度與高度的變化觀察下,發現鰭式太陽電池的特性較平面與徑型太陽電池更具優勢,此特性可作為未來太陽電池設計參考依據及其物理數學SPICE模型電路模擬之用。

In this thesis, we theoretically study the physical properties of the novel fin-shaped solar cell. The excess minority-carrier densities, photocurrent densities, and ideal diode current densities of neutral regions of the device are calculated based on a one-dimensional model using the ambipolar transport equantion and diffusion theory. The Shockley-Read-Hall theory is used for the depletion region calculations. Furthermore, the short-circuit current density, open-circuit voltage, fill factor, and efficiency are calculated, The results of the fin-shaped solar cell are compared with that of the planar and radial pn-junction solar cells. It is found that the performance of the fin-shaped solar cell prevails. Our results can be used as references for novel solar cell design and of the SPICE circuit simulations.

Contents

Acknowledgements…………………………………………………III
Chinese abstract …………………………………………………IV
Abstract………………………………………………………………………V
Contents……………………………………………………………………VI
List of Figures ……………………………………………………………VIII
List of Tables…………………………………………………………………XI


Chapter 1 Introductions……………………………………………………1
1-1 Review of the history and evolutions of solar cells………………………1
1-2 Computational tools of solar cell studies………………………………8
1-3 Motivations………………………………………………………………11
Chapter 2 Review of planar and radial pn-junction solar cells… ...……13
2.1 Analysis of planar and radial pn-junction solar cells.......................13
2.2 Boundary conditions…………..............………………………………….20
Chapter 3 Fin-shaped solar cell.……………...…………………………24
3-0 Structure of the fin-shaped solar cell…………………………………24
3-1 The n-type region…............................................................................... 26
3-1-1 Diffusive current density of the excess minority-carrier in the neutral region ….............................. ..........................………29
3-1-2 Diffusive current density of the excess minority-carrier at the boundary of neutral and depletion region ( )…........... ........... ...........………29
3-2The p-type region………………………………………………………31
3-2-1 The excess minority-carrier concentration and diffusion current density of in the neutral region …..............................………32
3-2-2 Diffusive current density of the excess minority-carrier at the boundary of neutral and depletion region ( )…............... ......... ............... ..........34
3-3 Current density in the depletion region…………………………………35
Chapter 4 The short-circuit current density and the open-circuit voltage of the fin-shaped solar cell.......... .......... .......... ........... ..........……………40
4-1 The short-circuit current density Jsc....... .......... .......... ..........……………40
4-2 The open-circuit voltage Voc….......... .......... .......... .......... ..........………47
4-3 The parasitic resistance…... .......... ..... ... .......... ..... ... .......... .....………51
Chapter 5 The fill factor and efficiency of fin-shaped solar cell..........55
5-1 The fill factor............ .... ... ......... .... ... ... .... ... ........ .... ... .................... ..55
5-2 The efficiency .... ... ........ .... ... ........ .... ... ........ .... ... .............................58
Chapter 6 The comparisons of fin-shaped solar cell and planar and radial pn-junction solar cells…...... ...... ...... ..... ...... ...... ...... ...... ......……67
6-0 The current density components of planar and radial pn-junction solar cells...... ...... .. ...... ...... .. ...... ...... .. ...... ...... .. ...... ...... .. ...... ...... ..………69
6-1 Responses of fin-shaped, planar, and radial pn-junction cells to single frequency light…...... .. ...... .. ...... .. ...... .. ...... .. ...... .. ...... .. ...... .. ...... ..…72
6-2 Responses of fin-shaped, planar, and radial pn-junction solar cells to the full solar spectrum light ... .. ........................ . ... .. ...... . ... .. ...... . ... . ...... ....74
6-2-1 The effect of the n-type region width to the photocurrents…. ....………75
6-2-2 The short-circuit current densities and the open-circuit voltage in the three types of solar cells……………...................................................... . . .…77
6-2-3 The fill factor in the three types of solar cells …………………………81
6-2-4 The efficiency of the three types of solar cells…………………………83
chapter 7 Conclusions and future work……………………………………88
References……………………………………………………………………90
Appendix……………………………………………………………………92
A. Silicon absorption coefficients …………………………………92
B. Numerical readings of spectral irradiance at Air Mass 1.5 ………………..92
C. Source code ………………………………………………………………..94

















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