期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 21, 页码 18087-18094出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b02164
关键词
Polymer solar cells; hole-transport layer; vanadium oxide hydrate; H2O2-UVO processing; interfacial contact
资金
- NNSF of China [51372158]
- NSF of Jiangsu Province [BK20160325]
- Suzhou key laboratory for advanced carbon materials and wearable energy technologies
- Collaborative Innovation Center (CIC) of Suzhou Nano Science and Technology
We demonstrate a facile and green approach to preparing a vanadium oxide hydrate (VO(x)nH(2)O) layer to serve as the hole-transport layer (HTL) in high-performance polymer solar cells (PSCs). The VO(x)nH(2)O layer was in situ prepared by a combined H2O2 and ultraviolet-ozone (UVO) processing on a VOx layer. The as-prepared VO(x)nH(2)O layer featured a work function of 5.0 0.1 eV, high transmittance, and better interface properties compared to those of the generally prepared VOx (UVO or thermal annealing) layers. PSCs based on poly[(ethylhexyl-thiophenyl)-benzodithiophene-(ethylhexyl)-thienothiophene]/[6,6]-phenyl-C-71-butyric acid methyl ester using the VO(x)nH(2)O layer as the HTL yielded high power conversion efficiencies (PCEs) up to 8.11%, outperforming the devices with VOx layers (PCE of 6.79% for the UVO-processed VOx layer and 6.10% for the thermally annealed VOx layer) and conventional polyethylenedioxythiophenepolystyrenesulfonate (PEDOT:PSS) layers (PCE of 7.67%). The improved PCE was attributed to the enhanced JSC and/or fill factor, which mainly correlate to the improved interfacial contact between the photoactive layer and the indium tin oxide/HTL or cathode when using the VO(x)nH(2)O layer as the HTL. A similar improvement in the PCE was also observed for the PSCs based on poly(3-hexylthiophene)/[6,6]-phenyl-C-61-butyric acid methyl ester. In addition, PSCs with a VO(x)nH(2)O layer as the HTL showed a higher stability than that of those with a PEDOT:PSS layer. Hence, it would be possible to use this simply and in situ prepared VO(x)nH(2)O layer as an inexpensive HTL for high-performance PSCs.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据