Double Cathode Modification Improves Charge Transport and Stability of Organic Solar Cells

Tao Lin () and Tingting Dai
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Tao Lin: Department of Physics, Beijing Technology and Business University, Beijing 100048, China
Tingting Dai: Department of Physics, Beijing Technology and Business University, Beijing 100048, China

Energies, 2022, vol. 15, issue 20, 1-13

Abstract: Introducing a cathode modification layer is an effective method to obtaining highly efficient organic solar cells (OSCs) and improving their stability. Herein, we innovatively introduced a double cathode modification layer (SnO 2 /ZnO) into a non-fullerene OSCs based on PM7:IT-4F and explored the mechanisms. The effects of SnO 2 /ZnO film on charge carriers transfer in OSCs are studied via a variety of electrical testing methods including Photo-CELIV measurements. As a result, a cathode buffer layer with low recombination rate and high carrier mobility could be introduced, which is beneficial to electron transport and collection. The champion device based on the double cathode modification layer acquires an efficiency of 12.91%, obviously higher than that of the single cathode modification layer (SnO 2 or ZnO) device. Moreover, The SnO 2 /ZnO double layer is demonstrated to be of great help in the improvement of device stability, and our work could provide a new inspiration for the preparation of OSCs cathode modification layer.

Keywords: organic solar cells; double cathode modification layer; charge transport (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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