Enhancing Efficiency and Stability for Colloidal Quantum Dot Solar Cells by Green-Solvent processable Hole-Transport Material
발표자
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초록
내용
For the commercial solar cells, it must be processable with green solvents with both high stability and performance. However, most hole-transport materials (HTMs) used in solar cells nowadays are processable only in hazardous solvents. In this work, we synthesized a novel random copolymer (asy-ranPBTBDT) for HTMs in colloidal quantum dot solar cells which is processable in the representative green solvent, 2-methylanisole. Compared with our previous work of synthesizing control polymer (asy-PBTBDT), the new polymer has strong π-π interaction and less grain growth. The resulting device showed 13.2% of power conversion efficiency and retained its initial efficiency after 120h for 89%.