Multiple electron transporting layers and their excellent properties based on organic solar cell.

ABSTRACT: To improve the performance of inverted polymer solar cells based on a ternary blend of polymerthieno [3,4-b] thiophene/benzodithiophene (PTB7), [6,6]-phenyl C₇₁-butyric acid methyl ester (PC₇₁BM) and indene-C60-bisadduct (ICBA), a two-layer structure of zinc oxide (ZnO) and Al-doped zinc oxide (AZO) nanoperticles is used to improve electron extraction. Comparing to ZnO, AZO has lower work function and thus provides larger built-in potential across the organic heterojunction, resulting in more efficient photo-current extraction and larger open circuit voltages. Optimum devices with ZnO/AZO nanoparticles show enhancement of both short circuit current and open circuit voltage, leading to a power conversion efficiency (PCE) of 8.85%. The argument of energy level buffering

SUBMITTER: Yang Z 

PROVIDER: S-EPMC5575332 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature