期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 59, 期 41, 页码 18131-18135出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202004432
关键词
interface engineering; interfacial dipoles; ionene polymers; organic semiconductors; organic solar cells
资金
- National Natural Science Foundation of China (NSFC) [21875018]
- Office of Naval Research, Materials Division [N00014-17-1-2241]
- Chinese Scholarship Council [201806070051]
Self-doping ionene polymers were efficiently synthesized by reacting functional naphthalene diimide (NDI) with 1,3-dibromopropane (NDI-NI) ortrans-1,4-dibromo-2-butene (NDI-CI) via quaternization polymerization. These NDI-based ionene polymers are universal interlayers with random molecular orientation, boosting the efficiencies of fullerene-based, non-fullerene-based, and ternary organic solar cells (OSCs) over a wide range of interlayer thicknesses, with a maximum efficiency of 16.9 %.NDI-NIshowed a higher interfacial dipole (Delta), conductivity, and electron mobility thanNDI-CI, affording solar cells with higher efficiencies. These polymers proved to efficiently lower the work function (WF) of air-stable metals and optimize the contact between metal electrode and organic semiconductor, highlighting their power to overcome energy barriers of electron injection and extraction processes for efficient organic electronics.
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