Interfacial Materials Engineering for Scaleable Organic Solar Cell
발표자
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초록
내용
The interfacial layers play a crucial role in enhancing the performance and stability of organic solar cells (OSCs). Despite achieving high efficiency in OSCs, the challenges associated with large area manufacturing and the need for nanoscale uniformity during coating have hindered large scale production. And also there is a need for continued research aimed at improving the performance of OSCs, with a particular focus on enhancing their visible light external quantum efficiency (EQE) for improving the efficiency of semitransparent OSCs (ST-OSCs). To address these issues, we propose the concept of hole transport layer (HTL) free OSCs to simplify fabrication processes and bilateral self-assembled monolayers modified electron transport layer (ETL) for highly efficient semi-transparent OSCs, respectively. In this study, incorporating phosphotungstic acid as an annealing-free HTL and as a solid additive into the photo-active layer (PM6:Y6:PC71BM) in conventional structured OSCs significantly boosts the power conversion efficiency (PCE) up to 17.28% and 16.33%, respectively, compared to the reference device with PEDOT:PSS (15.88%). We also successfully fabricated a large-area OSC module with an impressive PCE of 15.18% and an active area of 54 cm2, achieving approximately 85% of the effectiveness of small-area OSCs. Impressively, ST OSCs also led to significant device performance and transparency, with a PCE of 10.37% and average visible transmittance (AVT) of 36.27% by using bilateral self-assembled monolayers modified ZnO ETL in inverted OSCs.