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研究生:張玉函
研究生(外文):Chang, Yu-Han
論文名稱:刮刀塗佈技術於有機太陽能電池與多層結構有機鄰近感測器的應用
論文名稱(外文):Blade coating for polymer solar cells and multilayer polymer photo-detectors
指導教授:孟心飛
指導教授(外文):Meng, Hsin-Fei
學位類別:碩士
校院名稱:國立交通大學
系所名稱:物理研究所
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:2009
畢業學年度:97
語文別:英文
論文頁數:72
中文關鍵詞:共軛高分子塊材異質接面太陽能電池光偵測器P3HTPCBM
外文關鍵詞:conjugate polymerbulk hetero-junctionpolymer solar cellpolymer photo-detectorP3HTPCBM
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本研究採用施子(donor)材料- poly(3-hexylthiophene) (P3HT)以及受子(acceptor)材料-(6,6)-phenyl-C61-butyric acid methyl ester (PCBM),將其均勻混合於甲苯(toluene)溶液,利用刮刀塗佈技術製作塊材異質接面有機太陽能電池與光感測器。利用刮刀塗佈製程使能夠有序排列形成施子-受子的自組裝結構以提升載子的傳輸效率。
本研究之有機太陽能電池達到高能量轉換效率(power conversion efficiency, PCE) 3.8%,相較於一般於甲苯溶液以旋轉塗佈(spin coating)製程效率2.6%,整體元件效益提升達46%。於光感測元件的研究,透過刮刀製程應用於多層結構設計,將元件暗電流密度降低至10-5 mA/cm2,比單層旋轉塗佈製程元件可降低其暗電流值的100倍,有效提升整體元件感測靈敏度。
A donor-acceptor blend for bulk hetero-junction polymer solar cells and polymer photo-detectors are studied by using poly(3-hexylthiophene) (P3HT) as the donor and (6,6)-phenyl-C61-butyric acid methyl ester (PCBM) as the acceptor. Desired ordered donor-acceptor self-organization is achieved by blade coating with high carrier mobility.
The polymer solar cell with power conversion efficiency (PCE) is 3.8% in this study, which is 46% higher than that obtained by spin coating in toluene solution (2.6%). In addition, the multilayer photo-detector can be achieved by blade coating to reduce dark current density to 10-5 mA/cm2. That is about 100 times lower than that of single layer structure by spin coating, enhancing the sensitivity.
摘要............................................................................................................................................. i
Abstract ..................................................................................................................................... ii
致謝.......................................................................................................................................... iii
Contents ..................................................................................................................................... v
Tables ...................................................................................................................................... vii
Part 1 Efficient polymer solar cells by blade coating .............................................................. vii
Figures.................................................................................................................................... viii
Part 1 Efficient polymer solar cells by blade coating
Chapter 1 Introduction ................................................................................................................ 1
1.1 Background of research ........................................................................................................ 1
1.1.1 Energy resources and solar energy ..................................................................................... 1
1.1.2 Development of solar cells................................................................................................. 2
1.1.3 Development of polymer solar cells .................................................................................. 4
1.2 Motivation of research .......................................................................................................... 8
1.2.1 Opportunity for polymer solar cells ................................................................................... 8
1.2.2 Advantage of blade coating application in polymer solar cells ......................................... 9
1.3 Thesis frameworks for part 1 .............................................................................................. 11
Chapter 2 Theory ...................................................................................................................... 12
2.1 Fundamental principles of solar cells ................................................................................. 12
2.1.1 Equivalent circuit ............................................................................................................. 12
2.1.2 Basic parameters .............................................................................................................. 16
2.2 Characteristics of conjugate polymer materials .................................................................. 20
2.2.1 Development .................................................................................................................... 20
2.2.2 Photovoltaic property ....................................................................................................... 20
Chapter 3 Method ..................................................................................................................... 23
3.1 Experimental system ........................................................................................................... 23
3.1.1 Working principle of blade coating .................................................................................. 23
3.1.2 Device structures .............................................................................................................. 23
3.1.3 Material introduction ....................................................................................................... 24
3.2 Experimental process and measurement ............................................................................. 26
3.2.1 Deposition of the hole transport layer .............................................................................. 26
3.2.2 Deposition of the active layer .......................................................................................... 26
3.3 Measurement ....................................................................................................................... 27
3.3.1 Photovoltaic property ....................................................................................................... 27
3.3.2 External quantum efficiency ............................................................................................ 27
3.3.3 Morphology..................................................................................................................... 27
Chapter 4 Result and discussion ............................................................................................... 28
4.1 Device performance of bulk hetero-junction cells .............................................................. 28
4.2 Roughness of net P3HT and PCBM film ............................................................................ 36
Chapter 5 Conclusion ................................................................................................................ 39
Part 2 Multilayer polymer photo-detectors
Chapter 6 Introduction of polymer photo-detectors .................................................................. 40
6.1 Background of research ...................................................................................................... 40
6.1.1 Introduction of p`olymer proximity sensors .................................................................... 40
6.1.2 Development of polymer proximity sensors .................................................................... 41
6.1.3 Introduction of polymer photo-detectors ......................................................................... 41
6.2 Motivation of research ........................................................................................................ 43
6.2.1 Problems of polymer photo-detectors .............................................................................. 43
6.2.2 Multilayer structures ........................................................................................................ 44
6.2.3 Multilayer structures by Blade coating ............................................................................ 45
6.3 Thesis frameworks for part 2 .............................................................................................. 46
Chapter 7 Method ..................................................................................................................... 47
7.1 Material introduction .......................................................................................................... 47
7.2 Experimental processes ....................................................................................................... 47
7.2.1 Solution preparation ......................................................................................................... 48
7.2.2 Deposition of the active layer .......................................................................................... 48
7.3 Measurement ....................................................................................................................... 50
7.3.1 Photovoltaic property ....................................................................................................... 50
Chapter 8 Result and discussion ............................................................................................... 51
8.1 Single layer structures ......................................................................................................... 51
8.1.1 P3HT diode with blade coating and spin coating ............................................................ 51
8.1.2 Single layer photo-detector by blade coating and spin coating ....................................... 53
8.2 Multilayer photo-detectors with PCBM as hole blocking layer ......................................... 54
8.2.1 Bilayer structures ............................................................................................................. 54
8.2.2 Trilayer structure .............................................................................................................. 56
8.2.3 Problems of PCBM layer ................................................................................................. 63
8.3 Multilayer structures with BPhen as hole blocking layer ................................................... 63
8.3.1 Bilayer structure ............................................................................................................... 63
8.3.2 Trilayer structure .............................................................................................................. 64
8.3.3 The problem of BPhen layer ............................................................................................ 67
8.4 Next improvement .............................................................................................................. 68
Chapter 9 Conclusion ................................................................................................................ 69
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