聚氨酯
兴奋剂
氧化锡
化学
钝化
锡
太阳能电池
化学工程
共轭体系
有机太阳能电池
聚合物
纳米技术
光电子学
图层(电子)
材料科学
有机化学
工程类
作者
Xu Wang,Jing Tian,Zuhao You,Le Lei,Aokang Ge,Yao Liu
标识
DOI:10.1002/cjoc.202400692
摘要
Comprehensive Summary Tin oxide (SnO 2 ) has been widely used as an electron transport layer (ETL) in optoelectronic devices. However, there are numerous surface or bulk defects in SnO 2 , working as charge recombination centers to degrade device. Here, an electroactive and self‐healing polyurethane (PHNN) was designed by integrating conjugated unit – naphthalene diimide (NDI) into a typical polyurethane backbone. Numerous hydrogen bonds and π interactions in PHNN work as non‐covalent interactions to endow this polymer with superior self‐healing properties. PHNN contains lots of aliphatic amine and carbonyl groups, which effectively passivate the defects in SnO 2 . The π stacking of NDI units will facilitate electron delocalization, endowing PHNN with electrical activity compared with traditional polyurethane. Doping SnO 2 with PHNN can improve the conductivity and reduce the work function of SnO 2 layer, which is conducive to efficient charge extraction and transport. Using PHNN doped SnO 2 as ETL for PM6: Y6 and PM6: BTP‐eC9 based inverted organic solar cells can achieve a high efficiency of 17.16% and 17.51%, respectively. Devices containing doped SnO 2 ETL show significantly improved efficiency and stability. Thus, the electroactive polyurethane doped SnO 2 interlayers show high performance interfacial modification to align energy‐levels in solar cell devices, which have promising applications in organic electronics.
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