Recent Progress of Organic Photovoltaics with Efficiency over 17

• Published in: Energies (Basel) Vol. 14; no. 14; p. 4200
• Main Authors: Wang, Xuelin, Sun, Qianqian, Gao, Jinhua, Wang, Jian, Xu, Chunyu, Ma, Xiaoling, Zhang, Fujun
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01-07-2021
• Subjects: Acceptor materials; Annealing; Chlorine; Efficiency; Energy conversion efficiency; Energy loss; Infrared radiation; Materials selection; Morphology; non-fullerene materials; organic photovoltaics; Photovoltaics; Polymers; power conversion efficiency; Solar energy; Solvents; tandem structure; ternary strategy
• ISSN: 1996-1073; 1996-1073
• DOI: 10.3390/en14144200

The power conversion efficiency (PCE) of organic photovoltaics (OPVs) has exceeded 18% with narrow bandgap, non-fullerene materials Y6 or its derivatives when used as an electron acceptor. The PCE improvement of OPVs is due to strong photon harvesting in near-infrared light range and low energy loss. Meanwhile, ternary strategy is commonly recognized as a convenient and efficient means to improve the PCE of OPVs. In this review article, typical donor and acceptor materials in prepared efficient OPVs are summarized. From the device engineering perspective, the typical research work on ternary strategy and tandem structure is introduced for understanding the device design and materials selection for preparing efficient OPVs.