journal article·2019-07-12

Enabling Efficient Tandem Organic Photovoltaics with High Fill Factor via Reduced Charge Recombination

Yuqiang Liu, Pei Cheng, Jun Yuan, Tianyi Huang, Rui Wang, Dong Meng, Bineh Ndefru, Yingping Zou, Baoquan Sun, Yang Yang

ACS Energy Letters· Volume 4· Issue 7
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Abstract

Compared with inorganic photovoltaics, organic photovoltaics (OPVs) still have a low fill factor (FF) that restricts their power conversion efficiency (PCE). The FF is determined by the resistances that are influenced by carriers recombination. In this work, the tandem structure is demonstrated to be a feasible solution to improve the FF of OPVs. The recombination losses of subcells in the tandem structure are reduced and consequently improves the FF. When the two subcells are stacked in a tandem structure, the highest value of the FF reaches 76.6%, much higher than that of 66.1% achieved by its single junction device. Finally, a PCE of 14.1% with a FF of 73.6% is achieved in a tandem OPV after optimizing the thickness of each active layer. This work not only demonstrates the inherent mechanism for a higher FF in tandem OPVs but also presents a feasible solution for high-performance photovoltaic devices.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Organic Electronics and Photovoltaics · solar cell performance optimization · Perovskite Materials and Applications

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

Affiliations

Department of Materials Science and Engineering, University of California, Los Angeles, California 90095, United States

Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China

College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China

Funding

State Administration of Foreign Experts Affairs · Ministry of Science and Technology of the People's Republic of China · Ministry of Education of the People's Republic of China · Air Force Office of Scientific Research · Office of Naval Research · China Scholarship Council · National Natural Science Foundation of China · Collaborative Innovation Center of Suzhou Nano Science and Technology · Advanced Solar Technologies Institute, University of California

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