journal article·2019-12-13

Toward Scalable PbS Quantum Dot Solar Cells Using a Tailored Polymeric Hole Conductor

Ye Xue, Fan Yang, Jianyu Yuan, Yannan Zhang, Mengfan Gu, Yalong Xu, Xufeng Ling, Yao Wang, Fangchao Li, Tianshu Zhai, Junnan Li, Chaohua Cui, Yiwang Chen, Wanli Ma

ACS Energy Letters· Volume 4· Issue 12
Publisher page

Abstract

Colloidal quantum dot (CQD) solar cells processed from pre-exchanged lead sulfide (PbS) inks have received great attention in the development of scalable and stable photovoltaic devices. However, the current hole-transporting material (HTM) 1,2-ethanedithiol-treated PbS (PbS-EDT) CQDs have several drawbacks in terms of commercialization, including the need for oxidation and multilayer fabrication. Conjugated polymers are an alternative HTM with adjustable properties. Here we propose a series of conjugated polymers (PBDB-T, PBDB-T(Si), PBDB-T(S), PBDB-T(F)) for PbS CQD solar cells as HTMs. Through polymer side-chain engineering, we optimize the model polymer PBDB-T to tune the energy levels, increase hole mobility, improve solid-state ordering, and increase free carrier density. CQD solar cells based on modified polymer PBDB-T(F) exhibit a best power conversion efficiency (PCE) of 11.2%, which outperforms the devices based on conventional PbS-EDT HTM (10.6%) and is currently the highest PCE for PbS solar cells based on organic HTMs.
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Research context

OpenAlex topics: Quantum Dots Synthesis And Properties · Perovskite Materials and Applications · Organic Electronics and Photovoltaics

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

Affiliations

Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, 199 Ren-Ai Road, Suzhou Industrial Park, Suzhou, Jiangsu 215123, People’s Republic of China

Laboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China

College of Chemistry, Institute of Polymers and Energy Chemistry (IPEC), Nanchang University, 999 Xuefu Avenue, Nanchang 330031, China

Funding

State Administration of Foreign Experts Affairs · Ministry of Education of the People's Republic of China · Ministry of Science and Technology of the People's Republic of China · Natural Science Foundation of Jiangsu Province · China Postdoctoral Science Foundation · National Natural Science Foundation of China · Priority Academic Program Development of Jiangsu Higher Education Institutions · Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University

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