2021年2月5日,杨阳教授团队联合NREL的Matthew C. Beard团队和美国托莱多大学鄢炎发团队设计了一系列具有大π共轭体系的有机铵盐,发现当合理调控芘基共轭铵盐与B(阳离子)-X(无机阴离子)框架的作用距离,会对钙钛矿的表面前沿轨道产生影响。该种芘基铵盐可以改变钙钛矿的表面价带边结构并影响钙钛矿的载流子动力学。其中,引入芘乙胺的钙钛矿具有更高的空穴迁移率,能量转换效率以及稳定性。该工作为调控钙钛矿的电子结构提供了一个新的自由度。
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