Role of additional PCBM layer between ZnO and photoactive layers in inverted bulk-heterojunction solar cells

被引：86

作者：

Cho, Shinuk ^{[1
,2
]}

Kim, Kwang-Dae ^{[3
]}

Heo, Jinhee ^{[4
]}

Lee, Joo Yul ^{[4
]}

Cha, Gihoon ^{[4
]}

Seo, Bo Yeol ^{[4
]}

Kim, Young Dok ^{[3
]}

Kim, Yong Soo ^{[1
,2
]}

Choi, Si-young ^{[4
]}

Lim, Dong Chan ^{[4
]}

机构：

[1] Univ Ulsan, Dept Phys, Ulsan 680749, South Korea

[2] Univ Ulsan, Energy Harvest Storage Res Ctr, Ulsan 680749, South Korea

[3] Sungkyunkwan Univ, Dept Chem, Suwon 440746, South Korea

[4] Korea Inst Mat Sci, Surface Technol Div, Chang Won 641010, South Korea

来源：

SCIENTIFIC REPORTS | 2014年 / 4卷

基金：

新加坡国家研究基金会;

关键词：

ORGANIC PHOTOVOLTAICS; HIGHLY EFFICIENT; POLYMER; OPTIMIZATION; PERFORMANCE; FABRICATION; SURFACE;

D O I：

10.1038/srep04306

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

In order to induce greater light absorption, nano-patterning is often applied to the metal-oxide buffer layer in inverted bulk-heterojunction(BHJ) solar cells. However, current homogeneity was significantly disturbed at the interface, leading to an efficiency that was not fully optimized. In this work, an additional PC61BM layer was inserted between the ZnO ripple and the photoactive layer to enhance the electron extraction. The insertion of additional PC61BM layer provided substantial advantages in the operation of inverted BHJ solar cells; specifically, it enhanced current homogeneity and lowered accumulation and trapping of photogenerated charges at the ZnO interface. Inclusion of the additional PC61BM layer led to effective quenching of electron-hole recombination by a reduction in the number of accumulated charges at the surface of ZnO ripples. This resulted in a 16% increase in the efficiency of inverted BHJ solar cells to 7.7%, compared to solar cells without the additional PC61BM layer.

引用

页数：6

共 36 条

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