Polymeric hole-transport materials with side-chain redox-active groups for perovskite solar cells with good reproducibility.
Polymeric hole-transport materials with side-chain redox-active groups for perovskite solar cells with good reproducibility.
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具有侧链氧化还原活性基团的聚合物空穴传输材料，用于钙钛矿太阳能电池，具有良好的重现性。
DOI：
10.1039/c8cp04162h
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Fuentes Pineda R
中科院分区：
文献类型：
--
作者：
Fuentes Pineda R
由N-苯基对位具有不同取代基（–OCH3 和 –N(CH3)2）的苯乙烯衍生物 N,N-二苯基-4-乙烯基苯胺制备两种单体 M:OO 和 M:ON 及其相应的聚合物 P:OO 和 P:ON。合成了这些聚合物并对其进行了充分表征，以研究它们在钙钛矿太阳能电池（PSC）中作为空穴传输材料（HTM）的功能。从结构角度比较了这些单体和聚合物在 PSC 中作为 HTM 的热学、光学和电化学性质以及性能。聚合物形成更稳定的无定形玻璃态，并表现出比单体更高的热稳定性。对位的不同取代基会影响最高占据分子轨道 (HOMO) 能级，从而改变氧化电位。单体和聚合物均用作钙钛矿太阳能电池中的HTM，器件配置为FTO/bl-TiO2/mp-TiO2/CH3NH3PbI3/HTM/Au，导致M:OO的功率转换效率为7.48%，P:OO为5.14%，P:ON为5.28%，M:ON为3.52%。尽管表现出相对较低的效率，但与 Spiro-OMeTAD 或单体相比，聚合物表现出优越得多的再现性，这表明有必要进一步优化具有氧化还原侧基的聚合物 HTM。
Two monomers, M:OO and M:ON, and their corresponding polymers, P:OO and P:ON, were prepared from styrene derivatives N,N-diphenyl-4-vinyl-aniline with different substituents (–OCH3 and –N(CH3)2) in the N-phenyl para positions. The polymers were synthesised and fully characterised to study their function as hole transport materials (HTMs) in perovskite solar cells (PSCs). The thermal, optical and electrochemical properties and performance of these monomers and polymers as HTMs in PSCs were compared in terms of their structure. The polymers form more stable amorphous glassy states and showed higher thermal stability than the monomers. The different substituent in the para position influenced the highest occupied molecular orbital (HOMO) level, altering the oxidation potential. Both monomers and polymers were employed as HTMs in perovskite solar cells with a device configuration FTO/bl-TiO2/mp-TiO2/CH3NH3PbI3/HTM/Au resulting in power conversion efficiencies of 7.48% for M:OO, 5.14% for P:OO, 5.28% for P:ON and 3.52% for M:ON. Although showing comparatively low efficiencies, the polymers showed much superior reproducibility in comparison with Spiro-OMeTAD or the monomers, suggesting further optimisation of polymeric HTMs with redox side groups is warranted.
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