活动层
有机太阳能电池
材料科学
结晶度
聚合物太阳能电池
聚合物
玻璃化转变
聚苯乙烯
能量转换效率
化学工程
侧链
退火(玻璃)
高分子化学
图层(电子)
光电子学
纳米技术
复合材料
薄膜晶体管
工程类
作者
Meng Wang,Shenghua Liu,Peng You,Naixiang Wang,Gongguo Tang,Qian Miao,Feng Yan
出处
期刊:Solar RRL
[Wiley]
日期:2020-03-20
卷期号:4 (6)
被引量:16
标识
DOI:10.1002/solr.202000013
摘要
A series of insulating polymers are used as additives in nonfullerene organic solar cells (OSCs) for the first time. A significant relative power conversion efficiency (PCE) enhancement of up to 16% is observed with an introduction of polystyrene for only 5.0 wt% into the active layer of OSCs. Other insulating polymers possessing linear nonconjugated backbones with different side chains are also incorporated into OSCs and the resultant PCE enhancement decreases with the decrease in the side chain size. Another important issue that is noted is the glass transition temperature of the polymer additive. When the glass transition temperature is higher than the thermal annealing temperature of the active layer, the polymer additive plays a negative effect on the device performance and the device efficiency decreases monotonically with the increase in addition amount. So the effect of the insulating polymer additives in nonfullerene OSCs can be attributed to the reconstruction of the active layer films, which increases the crystallinity, carrier mobility, and carrier lifetime of the organic semiconductors in the bulk heterojunction of the devices. This work provides a guideline for the selection of polymer additives in OSCs apart from the consideration on the optoelectronic property of the additives.
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