Improved Light Harvesting and Improved Efficiency by Insertion of an Optical Spacer (ZnO) in Solution-Processed Small-Molecule Solar Cells

被引:560
作者
Kyaw, Aung Ko Ko [1 ,2 ]
Wang, Dong Hwan [1 ]
Wynands, David [1 ]
Zhang, Jie [2 ]
Thuc-Quyen Nguyen [1 ]
Bazan, Guillermo C. [1 ]
Heeger, Alan J. [1 ]
机构
[1] Univ Calif Santa Barbara, Ctr Polymers & Organ Solids, Santa Barbara, CA 93106 USA
[2] ASTAR, Inst Mat Res & Engn, Singapore 11760, Singapore
基金
美国国家科学基金会;
关键词
Solution-processed small-molecule solar cell; optical spacer; ZnO nanoparticle; recombination; PHOTOVOLTAIC DEVICES; INTENSITY DEPENDENCE; THIN-FILMS; PHOTOCURRENT; RECOMBINATION; PERFORMANCE; GENERATION; PLASMONICS; VOLTAGE; OXIDE;
D O I
10.1021/nl401758g
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
We demonstrate that the power conversion efficiency can be significantly improved in solution-processed small-molecule solar cells by tuning the thickness of the active layer and inserting an optical spacer (ZnO) between the active layer and the Al electrode. The enhancement in light absorption in the cell was measured with UV-vis absorption spectroscopy and by measurements of the photoinduced carriers generation rate. The ZnO layer used to improve the light-harvesting increases the charge collection efficiency, serves as a blocking layer for holes, and reduces the recombination rate. The combined optical and electrical improvements raise the power conversion efficiency of solution-processed small-molecule solar cells to 8.9%, that is, comparable to that of polymer counterparts.
引用
收藏
页码:3796 / 3801
页数:6
相关论文
共 38 条
[11]   New architecture for high-efficiency polymer photovoltaic cells using solution-based titanium oxide as an optical spacer [J].
Kim, JY ;
Kim, SH ;
Lee, HH ;
Lee, K ;
Ma, WL ;
Gong, X ;
Heeger, AJ .
ADVANCED MATERIALS, 2006, 18 (05) :572-+
[12]   Photonic Crystal Geometry for Organic Solar Cells [J].
Ko, Doo-Hyun ;
Tumbleston, John R. ;
Zhang, Lei ;
Williams, Stuart ;
DeSimone, Joseph M. ;
Lopez, Rene ;
Samulski, Edward T. .
NANO LETTERS, 2009, 9 (07) :2742-2746
[13]   Light intensity dependence of open-circuit voltage of polymer:fullerene solar cells -: art. no. 123509 [J].
Koster, LJA ;
Mihailetchi, VD ;
Ramaker, R ;
Blom, PWM .
APPLIED PHYSICS LETTERS, 2005, 86 (12) :1-3
[14]   Plasmon-Enhanced Charge Carrier Generation in Organic Photovoltaic Films Using Silver Nanoprisms [J].
Kulkarni, Abhishek P. ;
Noone, Kevin M. ;
Munechika, Keiko ;
Guyer, Samuel R. ;
Ginger, David S. .
NANO LETTERS, 2010, 10 (04) :1501-1505
[15]   Intensity Dependence of Current-Voltage Characteristics and Recombination in High-Efficiency Solution-Processed Small-Molecule Solar Cells [J].
Kyaw, Aung Ko Ko ;
Wang, Dong Hwan ;
Gupta, Vinay ;
Leong, Wei Lin ;
Ke, Lin ;
Bazan, Guillermo C. ;
Heeger, Alan J. .
ACS NANO, 2013, 7 (05) :4569-4577
[16]   Efficient Solution-Processed Small-Molecule Solar Cells with Inverted Structure [J].
Kyaw, Aung Ko Ko ;
Wang, Dong Hwan ;
Gupta, Vinay ;
Zhang, Jie ;
Chand, Suresh ;
Bazan, Guillermo C. ;
Heeger, Alan J. .
ADVANCED MATERIALS, 2013, 25 (17) :2397-2402
[17]   Enhanced Solar-Cell Efficiency in Bulk-Heterojunction Polymer Systems Obtained by Nanoimprinting with Commercially Available AAO Membrane Fitters [J].
Lee, Jae Hyun ;
Kim, Dae Woo ;
Jang, Hong ;
Choi, Jong Kil ;
Geng, Jianxin ;
Lung, Joe Wook ;
Yoon, Sung Cheol ;
Jung, Hee-Tae .
SMALL, 2009, 5 (19) :2139-2143
[18]   Improving optical performance of inverted organic solar cells by microcavity effect [J].
Long, Yongbing .
APPLIED PHYSICS LETTERS, 2009, 95 (19)
[19]   Origin of the reduced fill factor and photocurrent in MDMO-PPV:PCNEPV all-polymer solar cells [J].
Mandoc, M. Magdalena ;
Veurman, Welmoed ;
Koster, L. Jan Anton ;
de Boer, Bert ;
Blom, Paul W. M. .
ADVANCED FUNCTIONAL MATERIALS, 2007, 17 (13) :2167-2173
[20]   Charge transport and photocurrent generation in poly (3-hexylthiophene): Methanofullerene bulk-heterojunction solar cells [J].
Mihailetchi, VD ;
Xie, HX ;
de Boer, B ;
Koster, LJA ;
Blom, PWM .
ADVANCED FUNCTIONAL MATERIALS, 2006, 16 (05) :699-708