Dramatic Enhancement of Power Conversion Efficiency in Polymer Solar Cells by Conjugating Very Low Ratio of Triplet Iridium Complexes to PTB7

Min Qian; Ran Zhang; Jingyu Hao; Wenjun Zhang; Qin Zhang; Jianpu Wang; Youtian Tao; Shufen Chen; Junfeng Fang; Wei Huang

doi:10.1002/adma.201500730

Dramatic Enhancement of Power Conversion Efficiency in Polymer Solar Cells by Conjugating Very Low Ratio of Triplet Iridium Complexes to PTB7

Adv Mater. 2015 Jun 17;27(23):3546-52. doi: 10.1002/adma.201500730. Epub 2015 May 6.

Authors

Min Qian¹, Ran Zhang², Jingyu Hao², Wenjun Zhang³, Qin Zhang², Jianpu Wang¹, Youtian Tao¹, Shufen Chen², Junfeng Fang³, Wei Huang^{1

2}

Affiliations

¹ Key Lab for Flexible Electronics and Institute of Advanced Materials, Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China.
² Key Laboratory for Organic Electronics and Information Displays and Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, 210046, P. R. China.
³ Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China.

PMID: 25946623
DOI: 10.1002/adma.201500730

Abstract

Various low ratios of triplet iridium complexes (0, 0.5, 1, 1.5, 2.5, and 5 mol%) are conjugated to the backbone of the famous champion donor polymer PTB7. At the same conditions, the power conversion efficiency for polymer containing 1% of Ir increases by 45%, 39%, and 31% in three batches of devices compared with control Ir-free PTB7.

Keywords: charge recombination; iridium complexes; polymer solar cells; power conversion efficiency; triplets.