Harnessing the Role of Charge Transport Layers for Efficient Design of PBDBT/ITIC-OE Based Organic Solar Cell

• Published in: Transactions on electrical and electronic materials 2023-08, Vol.24 (4), p.356-364
• Main Authors: Tara, Ayush, Bharti, Vishal, Sharma, Susheel, Gupta, Rockey
• Format: Article
• Language: English
• Subjects: Chemistry and Materials Science; Electronics and Microelectronics; Instrumentation; Materials Science; Optical and Electronic Materials; Regular Paper
• ISSN: 1229-7607; 2092-7592
• DOI: 10.1007/s42341-023-00456-6

Fullerene-free organic solar cells having high dielectric constant acceptor material ITIC-OE hold a great deal of promise for breakthroughs in organic photovoltaics research in the future. In this paper, the impact of electron transport layers and hole transport layers on non fullerene acceptor based bulk heterojunction organic solar cell with device structure: FTO/ETL/PBDB-T:ITIC-OE/HTL/Au has been examined using the solar cell capacitance simulator. The device structure has been investigated with different ETLs such as TiO 2 , ZnO, and ZnOS, as well as HTLs such as CuI, CuSCN, and Cu 2 O. The investigations have shown that ZnOS and Cu 2 O have been shown to be the most effective ETL and HTL for the proposed structure, having values of V OC, JSC, FF and PCE as 1.1313 V, 13.86 mAcm-2, 79.81% and 12.52% respectively. Further, absorber layer has been optimized in terms of its thickness (250 nm) and density of defects (10 12  cm −3 ). The optimization of interfacial layers resulted in optimized thickness of ETL as 50 nm and HTL as 150 nm. When simulation is performed by using improved parameters, the photovoltaic parameters of the proposed device are found to be significantly improved, having values of V OC , J SC , FF and PCE as 1.1241 V, 21.01 mAcm-2, 85.14%, and 20.12% respectively.