journal article·2019-05-10Open access

Elevated Stability and Efficiency of Solar Cells via Ordered Alloy Co-Acceptors

Qiaoqiao Zhao, Zuo Xiao, Jianfei Qu, Longzhu Liu, Henning Richter, Wei Chen, Liang Han, Meijing Wang, Jieming Zheng, Zengqi Xie, Liming Ding, Feng He

ACS Energy Letters· Volume 4· Issue 5

Abstract

Power conversion efficiency (PCE) and long-term stability are the two key parameters of photovoltaic devices to meet standards for commercial use. In this Letter, an ordered alloyed co-acceptor by incorporating PC61BM and COi8DFIC is obtained. This ordered alloy structure increases the light absorption by producing a shoulder peak at 935 nm and improves electron mobility from 1.51 × 10–5 to 8.91 × 10–4 cm2 V–1 s–1 by PC61BM interacting with the end group of COi8DFIC and connecting adjacent COi8DFIC molecules. Consequently, the PCE is enhanced from 10.80 to 14.22%, enhancement of about 32%. Even further, the device stability is improved due to the fact that the alloy fixes the morphology of the active layer. After keeping for 7200 h, about 10 months, the PCE of those solar cells is retained at 13.2%, corresponding to a PCE loss of only 5.7%, while the PCE loss in the binary control device is up to 33.3%.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Organic Electronics and Photovoltaics · Perovskite Materials and Applications · Conducting polymers and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China

Center for Excellence in Nanoscience (CAS), Key Laboratory of Nanosystem and Hierarchical Fabrication (CAS), National Center for Nanoscience and Technology, Beijing 100190, China

Nano-C, 33 Southwest Park, Westwood, Massachusetts 02090, United States

Materials Science Division, Argonne National Laboratory, 9700 Cass Avenue, Lemont, Illinois 60439, United States

Institute for Molecular Engineering, The University of Chicago, 5640 South Ellis Avenue, Chicago, Illinois 60637, United States

Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China

Funding

National Natural Science Foundation of China · Natural Science Foundation of Guangdong Province · Chinese Academy of Sciences · Ministry of Science and Technology of the People's Republic of China · Shenzhen Nobel Prize Scientists Laboratory Project · Shenzhen Fundamental Research program

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