期刊
CHEMSUSCHEM
卷 14, 期 24, 页码 5442-5449出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.202101824
关键词
energy conversion; non-fullerene acceptors; organic photovoltaics; perylene diimide derivative; solar cells
资金
- National Natural Science Foundation of China [51933001, 51973020]
By utilizing a PDI derivative as the third component, high-efficiency ternary organic solar cells were prepared with improved device efficiency and short-circuit current density, while still maintaining a high open-circuit voltage.
A perylene diimide (PDI) derivative was used as the third component to prepare high-efficiency ternary organic solar cells (OSCs). PDI derivatives usually bear a wide bandgap and a long exciton diffusion length, which could be helpful to promote the device efficiency and still retain a high open-circuit voltage (V-oc). Compared with the binary OSC, the photovoltaic performance improved. Further changing the method for preparing the processing solutions from dissolving the polymer donor and small-molecule acceptor ITTC together to dissolving them individually, molecular packing in the deposited active layer could be adjusted and the short-circuit current density could be increased. As a result, the final device efficiency in such OSCs achieved 12.29 % power conversion efficiency (PCE) with a high V-oc of 0.93 V. When using the PDI derivative as the third component to D18 : BTP-eC9-based OSCs, a high PCE of 17.38 % was obtained, which is the best one among photovoltaic devices employing PDI derivatives.
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