Coherent Phonon‐Induced Modulation of Charge Transfer in 2D Hybrid Perovskites
Coherent Phonon‐Induced Modulation of Charge Transfer in 2D Hybrid Perovskites
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二维混合钙钛矿中电荷转移的相干声子诱导调制
DOI:
10.1002/adfm.202213021
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发表时间:
2023
影响因子:
19
通讯作者:
Gundogdu, Kenan
中科院分区:
文献类型:
--
作者:
Seyitliyev, Dovletgeldi;Qin, Xixi;Jana, Manoj K.;Janke, Svenja M.;Zhong, Xiaowei;You, Wei;Mitzi, David B.;Blum, Volker;Gundogdu, Kenan
Electron–phonon interactions play an essential role in charge transport and transfer processes in semiconductors. For most structures, tailoring electron–phonon interactions for specific functionality remains elusive. Here, it is shown that, in hybrid perovskites, coherent phonon modes can be used to manipulate charge transfer. In the 2D double perovskite, (AE2T)2AgBiI8(AE2T: 5,5“‐diylbis(amino‐ethyl)‐(2,2”‐(2)thiophene)), the valence band maximum derived from the [Ag0.5Bi0.5I4]2–framework lies in close proximity to the AE2T‐derived HOMO level, thereby forming a type‐II heterostructure. During transient absorption spectroscopy, pulsed excitation creates sustained coherent phonon modes, which periodically modulate the associated electronic levels. Thus, the energy offset at the organic–inorganic interface also oscillates periodically, providing a unique opportunity for modulation of interfacial charge transfer. Density‐functional theory corroborates the mechanism and identifies specific phonon modes as likely drivers of the coherent charge transfer. These observations are a striking example of how electron–phonon interactions can be used to manipulate fundamentally important charge and energy transfer processes in hybrid perovskites.
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影响因子:
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作者:
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通讯作者:
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影响因子:
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影响因子:
16.6
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通讯作者:
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