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Oligo(aniline)-based Hole Transport Layer for Organic Solar Cells
Ngoc-Lan Phan Tan,김진석,김범준 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.1
The contribution of interfacial layers to device performance and stability is considered important. The most widely used hole transport layer (HTL) for conventional organic solar cells (OSCs)–PEDOT:PSS has some shortcomings such as the acidity and the hygroscopicity which cause the limitation for long-term stability. In this study, we report the doping system of an aniline derivative (PTA) and an aryl sulfonic acid (NSO-2), which can be employed as HTL for OSCs. Devices fabricated from this HTL on PM6:Y6 active layers exhibited comparative power conversion efficiency (PCE) with control device of PEDOT:PSS (14.94% vs. 15.05%). Moreover, the devices with PTA:NSO-2 HTL also emphasizes its better moisture stability than PEDOT:PSS. Therefore, this initial result demonstrates the potential of aniline-based materials as HTL for OSCs as well as motivates the further optimization to achieve the higher photovoltaic performance.
Ngoc-Lan Phan Tan,김진석,이승진,김건우,김범준 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.2
The selection of interfacial layers in organic solar cells (OSCs) is crucial for enhancing their power conversion efficiency (PCE) and stability. PEDOT:PSS is the most widely used hole transport layer (HTL); however, device stability is often severely degraded, owing to the strong acidity and hygroscopicity of PEDOT:PSS. Herein, we report a new efficient HTL system comprising an oligo(aniline) host (PBD) and a protonic acid dopant (PFBSA), and demonstrate its use in OSC devices. Desirable properties like high transmittance, excellent conductivity, and appropriate work function establish the suitability of the PBD:PFBSA film as an HTL. Thus, a PBD:PFBSA HTL is employed in the PM6:Y6-based OSC system to achieve a PCE of 15.24%. Importantly, the PBD:PFBSA HTL-based OSC exhibits significantly higher device stability than the PEDOT:PSS HTL. Our results highlight the successful design of an oligo(aniline)-based material and its practical application as an effective HTL for OSCs.
Hoan Minh Tran,Lan Ngoc Tan Phan,Thang Van Le,Thuy Thuy Truong,Tam Huu Nguyen,Khuong Tung Truong,Le-Thu T. Nguyen,Mai Thanh Phong,Ha Tran Nguyen 한국고분자학회 2019 폴리머 Vol.43 No.4
A novel organic photocatalyst, 4-(10H-phenothiazin-10-yl)-N,N-diphenylaniline (PDPA) has been successfully synthesized from triphenylamine and phenothiazine moiety via Buchwald-Hartwig C-N coupling. The chemical structure of catalyst was characterized via proton nuclear magnetic resonance (1H NMR) and the optical properties were investigated via UV-vis spectroscopy. The PDPA has been applied as an organic photocatalyst for metal free atom transfer radical polymerization (O-ATRP). The well-controlled molecular weights of polymethacrylates have been obtained with high yield of 95% and narrow polydispersity index (Đ).