Formulation engineering for optimizing ternary electron acceptors exemplified by isomeric PC71BM in planar perovskite solar cells

被引：31

作者：

Dai, Si-Min ^{[1
]}

Zhang, Xin ^{[1
]}

Chen, Wei-Yi ^{[2
]}

Li, Xiang ^{[1
]}

Tan, Zhan'ao ^{[3
]}

Li, Cong ^{[3
]}

Deng, Lin-Long ^{[2
]}

Zhan, Xin-Xing ^{[1
]}

Lin, Min-Song ^{[1
]}

Xing, Zhou ^{[1
]}

Wen, Tao ^{[4
]}

Ho, Rong-Ming ^{[4
]}

Xie, Su-Yuan ^{[1
]}

Huang, Rong-Bin ^{[1
]}

Zheng, Lan-Sun ^{[1
]}

机构：

[1] Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, iChEM Collaborat Innovat Ctr Chem Energy Mat, Dept Chem,Coll Chem & Chem Engn, Xiamen 361005, Peoples R China

[2] Xiamen Univ, Pen Tung Sah Inst Micronano Sci & Technol, Xiamen 361005, Peoples R China

[3] North China Elect Power Univ, Beijing Key Lab Novel Thin Film Solar Cells, Sch Renewable Energy, Beijing 102206, Peoples R China

[4] Natl Tsing Hua Univ, Dept Chem Engn, Hsinchu 30013, Taiwan

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2016年 / 4卷 / 48期

关键词：

POWER CONVERSION EFFICIENCY; BISADDUCT REGIOISOMERS; LOW-COST; PERFORMANCE; BISPC(71)BM; HYSTERESIS; EMERGENCE; DONOR; FILM;

D O I：

10.1039/c6ta07750a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

As the most prevalently used fullerene-based electron acceptor in organic-inorganic solar cells, [6,6]-phenyl-C-71-butyric acid methyl ester (PC71BM) was isolated into three typical isomers of alpha-, beta(1)- and beta(2)-PC71BM with comparable molecular orbital energy levels for exemplifying a formulation engineering based on blending the three isomers to improve photovoltaic performance. The power conversion efficiency (PCE), photocurrent hysteresis and stability of planar heterojunction perovskite (CH3NH3PbI3) solar cells have been optimized by formulation engineering with mixed PC71BM (alpha : beta(1) : beta(2) = 17 : 1 : 2), the specific mixture which represents the best electron acceptor superior to either each of the purified isomers or any other ternary isomers of PC71BM. Microscopic analyses support that molecular aggregation of the isomeric PC71BM was critical to influence the surface morphology and, in turn, the PCE in the range of 0.38-17.56% of the perovskite solar cells involved. This finding about isomer-dependent photovoltaic performance launches a heretofore unknown strategy of formulation engineering for making efficient electron acceptors by mixing various fullerene derivatives having isomeric structures or beyond.

引用

页码：18776 / 18782

页数：7

共 54 条

[1] Non-Fullerene Polymer Solar Cells Based on Alkylthio and Fluorine Substituted 2D-Conjugated Polymers Reach 9.5% Efficiency [J].