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Tuning halide perovskite energy levels
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2020-12-16 , DOI: 10.1039/d0ee02216k Laura Canil 1, 2, 3, 4 , Tobias Cramer 5, 6, 7, 8 , Beatrice Fraboni 5, 6, 7, 8 , Damiano Ricciarelli 8, 9, 10, 11, 12 , Daniele Meggiolaro 8, 9, 10, 11 , Ajay Singh 4, 13, 14, 15 , Maning Liu 16, 17, 18, 19 , Marin Rusu 2, 3, 4, 20 , Christian M. Wolff 4, 21, 22, 23 , Nga Phung 1, 2, 3, 4 , Qiong Wang 1, 2, 3, 4 , Dieter Neher 4, 21, 22, 23 , Thomas Unold 2, 3, 4, 20 , Paola Vivo 16, 17, 18, 19 , Alessio Gagliardi 4, 13, 14, 15 , Filippo De Angelis 8, 9, 10, 11, 12 , Antonio Abate 1, 2, 3, 4, 24
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2020-12-16 , DOI: 10.1039/d0ee02216k Laura Canil 1, 2, 3, 4 , Tobias Cramer 5, 6, 7, 8 , Beatrice Fraboni 5, 6, 7, 8 , Damiano Ricciarelli 8, 9, 10, 11, 12 , Daniele Meggiolaro 8, 9, 10, 11 , Ajay Singh 4, 13, 14, 15 , Maning Liu 16, 17, 18, 19 , Marin Rusu 2, 3, 4, 20 , Christian M. Wolff 4, 21, 22, 23 , Nga Phung 1, 2, 3, 4 , Qiong Wang 1, 2, 3, 4 , Dieter Neher 4, 21, 22, 23 , Thomas Unold 2, 3, 4, 20 , Paola Vivo 16, 17, 18, 19 , Alessio Gagliardi 4, 13, 14, 15 , Filippo De Angelis 8, 9, 10, 11, 12 , Antonio Abate 1, 2, 3, 4, 24
Affiliation
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The ability to control the energy levels in semiconductors is compelling for optoelectronic applications. In this study, we managed to tune the work function (WF) of halide perovskite semiconductors using self-assembled monolayers of small molecules to induce stable dipoles at the surface. The direction and intensity of the surface dipoles rely on specific molecule-to-surface interactions. Electron acceptor or donor molecules result in the positive or negative WF shifts up to several hundreds of meV. Our approach provides a versatile tool to control the WF of halide perovskite and adjust the energy level alignment at the interface with charge transport materials in perovskite-based optoelectronics. The impact on perovskite solar cells is reported and discussed in detail with the support of modelling.
中文翻译：
调整卤化物钙钛矿的能级
控制半导体能量水平的能力在光电应用中非常引人注目。在这项研究中，我们设法利用自组装的小分子单分子层在表面诱导稳定的偶极子，从而对卤化钙钛矿半导体的功函数（WF）进行了调整。表面偶极子的方向和强度取决于特定的分子与表面的相互作用。电子受体或供体分子导致正或负WF移位高达数百meV。我们的方法提供了一种多功能的工具，可控制钙钛矿卤化物的WF并调整与基于钙钛矿的光电器件中的电荷传输材料的界面处的能级对准。在建模的支持下，对钙钛矿太阳能电池的影响进行了报道和讨论。
更新日期：2020-12-24
中文翻译：
调整卤化物钙钛矿的能级
控制半导体能量水平的能力在光电应用中非常引人注目。在这项研究中，我们设法利用自组装的小分子单分子层在表面诱导稳定的偶极子，从而对卤化钙钛矿半导体的功函数（WF）进行了调整。表面偶极子的方向和强度取决于特定的分子与表面的相互作用。电子受体或供体分子导致正或负WF移位高达数百meV。我们的方法提供了一种多功能的工具，可控制钙钛矿卤化物的WF并调整与基于钙钛矿的光电器件中的电荷传输材料的界面处的能级对准。在建模的支持下，对钙钛矿太阳能电池的影响进行了报道和讨论。
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