窄带隙(NBG)供体或受体的设计及其在有机太阳能电池(OSC)中的应用在将太阳光子转换为电子方面非常重要。受光伏材料光带隙到OSC设备开路电压不可避免的能量损失的限制,基于NBG的OSC的功率转换效率(PCE)的提高面临巨大挑战。据报道,一种新型的受体-供体-受体结构化的非富勒烯受体具有1.24 eV的超窄带隙,这是通过增强分子内电荷转移(ICT)效应实现的。在OSC器件中,尽管能量损失仅为0.509 eV,但短路电流密度却高达25.3 mA cm -2仍会记录,这是所有OSC设备的最大值。基于NBG的OSC的PCE高达10.9%,这表明超窄材料的设计和应用具有进一步改善OSC设备PCE的潜力。
[EN] MOLECULAR MATERIALS BASED ON PHENOXYAZINE CORE FOR HETEROJUNCTION ORGANIC SOLAR CELLS<br/>[FR] MATÉRIAUX MOLÉCULAIRES À BASE DE NOYAU DE PHÉNOXYAZINE POUR CELLULES SOLAIRES ORGANIQUES À HÉTÉROJONCTION
申请人:SUMITOMO CHEMICAL CO
公开号:WO2021079140A1
公开(公告)日:2021-04-29
A composition comprising an electron acceptor material and an electron donor material wherein the electron acceptor material is a compound of formula (I): EAG-EDG-EAG (I) wherein each EAG is an electron-accepting group and EDG is a group of formula (II): (II) wherein: n is at least 1; each m is independently 0 or at least 1; each X, Y and A is independently O, S or Se; Z, independently in each occurrence if n is greater than 1, is O, S, C=O or NR9 wherein R9 is H or a substituent; and R1- R8 are each independently selected from H or a substituent. The composition may be used as photosensitive organic layer of an organic photodetector.
Fused‐ring electron acceptors have made significant progress in recent years, while the development of fully non‐fused ring acceptors has been unsatisfactory. Here, two fully non‐fused ring acceptors, o‐4TBC‐2F and m‐4TBC‐2F, were designed and synthesized. By regulating the location of the hexyloxy chains, o‐4TBC‐2F formed planar backbones, while m‐4TBC‐2F displayed a twisted backbone. Additionally
The invention relates to novel organic semiconducting compounds containing apolycyclicunit, to methods for their preparation and educts or intermediates used therein, to compositions, polymer blends and formulations containing them, to the use of the compounds, compositions and polymer blends as organic semiconductors in, or for the preparation of, organic electronic (OE) devices, especially organic photovoltaic (OPV) devices, perovskite-based solar cell (PSC) devices, organic photodetectors (OPD), organic field effect transistors (OFET) and organic light emitting diodes (OLED), and to OE, OPV, PSC, OPD,OFET and OLED devices comprising these compounds, compositions or polymer blends.