A diketopyrrolopyrrole-containing hole transporting conjugated polymer for use in efficient stable organic–inorganic hybrid solar cells based on a perovskite

• DOI: 10.1039/c3ee44174a
• Publication Date: 2014-01-27T15:30:50Z
• Authors: Young Soo Kwon; Jongchul Lim; Hui-Jun Yun; Yun-Hi Kim; Taiho Park
• Keywords: Hybrid solar cell; Electron Mobility

Poly[2,5-bis(2-decyldodecyl)pyrrolo[3,4-c]pyrrole-1,4(2H,5H)-dione-(E)-1,2-di(2,2′-bithiophen-5-yl) ethene] (PDPPDBTE) was successfully incorporated as a p-type hole transporting material in solid-state organic–inorganic hybrid solar cells. The excellent optical and electrical properties of organo-lead halide perovskite (CH3NH3PbI3) nanocrystals used light harvesters yielded 9.2% power conversion efficiency (PCE) for the best-performing cell that exceeded value (7.6%) obtained from best conductor yet reported (2,2′,7,7′-tetrakis(N,N-di-p-methoxyphenyl-amine)9,9′-spirobifluorene, spiro-MeOTAD). high PCE attributed to optimal oxidation potential (5.4 eV) charge carrier mobility polymer. hydrophobicity polymer prevented water permeation into porous heterojunction, long-term aging tests over 1000 hours confirmed enhanced stability PDPPDBTE-based