Park, So Hyun Park, Sungmin Lee, Keun Jun Kim, Jai Kyeong Son, Hae Jung 2024-01-19T13:33:43Z 2024-01-19T13:33:43Z 2022-01-10 2021-10 0143-7208 https://pubs.kist.re.kr/handle/201004/116321 Nonfullerene acceptors have played a critical role in achieving record efficiency of organic photovoltaic (OPV) devices, and ITIC-based materials are an important type of nonfullerene acceptor. Herein, we developed new interlayer polymers for nonfullerene acceptor-based OPVs: PDMA(N)EMA and PDMA (N-O)EMA. In particular, PDMA(N)EMA effectively lowered the work function at the interface with the bulk heterojunction active layer and thus enabled efficient electron collection by the OPV device. Therefore, the OPV device incorporating PDMA (N)EMA showed a power conversion efficiency (PCE) of 8.19%, which was substantially enhanced compared with the 4.54% PCE of an ethoxylated polyethylenimine (PEIE)-based device. Whereas PEIE chemically attacked ITIC and degraded the performance of the OPV device, the PDMA(N)EMA formed a stable interface with ITIC, resulting in a dramatic increase of the VOC of the PDMA(N)EMA-based devices. Furthermore, the suppression of degradation at the PDMA(N)EMA interface also improved device stability at elevated temperatures. This work highlights the importance of the design and development of appropriate interlayer materials for realizing stable and high-efficiency nonfullerene-based OPVs. English ELSEVIER SCI LTD NON-FULLERENE ACCEPTOR PERFORMANCE LAYER ELECTRODES DESIGN FILM Development of interlayers based on polymethacrylate incorporating tertiary amine for organic solar cells with improved efficiency and stability Article 10.1016/j.dyepig.2021.109523 1 DYES AND PIGMENTS, v.194 DYES AND PIGMENTS 194 scie scopus 000685514700001 2-s2.0-85109217192 Chemistry, Applied Engineering, Chemical Materials Science, Textiles Chemistry Engineering Materials Science Article NON-FULLERENE ACCEPTOR PERFORMANCE LAYER ELECTRODES DESIGN FILM Polymer interlayer Nonfullerene acceptor Interface Device stability Organic photovoltaics