Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5442452 | Optical Materials | 2017 | 9 Pages |
Abstract
Two new A-D-A small molecules with alkoxyphenyl and alkylthiophenyl-substituted naphtho[1,2-b:5,6-bâ²]difuran (NDF) as the central building block named NDFPO-DPP and NDFPS-DPP were synthesized and firstly used as donor materials in organic solar cells (OSCs). The effects of the alkoxyphenyl and alkylthiophenyl side chains on the NDF unit have been investigated. With a single atom variation from O to S, NDFPS-DPP exhibited lower HOMO energy levels than its counterpart NDFPO-DPP, which resulted in enhanced Voc. The device based on NDFPO-DPP with thermal annealing exhibited a better PCE of 3.10% due to the higher and more balanced hole and electron mobilities. The investigations show that NDF could be a promising building block in OSCs via rational molecular structure design and device optimizations.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Hongjian Peng, Xiangfeng Luan, Lixia Qiu, Hang Li, Ye Liu, Yingping Zou,