论文标题
揭示单线裂变分子和杂交钙钛矿纳米晶之间的电荷转移动力学
Revealing the Charge Transfer Dynamics Between Singlet Fission Molecule and Hybrid Perovskite Nanocrystals
论文作者
论文摘要
Singlet裂变过程引起了很大的关注，因为它有可能提高光伏效率并打破冲击Queisser极限。在光伏设备中，钙钛矿材料在过去十年中显示出巨大的进步。因此，在钙钛矿设备中结合单线裂变材料会导致其性能急剧增强。为了揭示单线裂变过程在钙钛矿材料中的适用性，我们研究了使用瞬时吸收光谱法的CH3NH3PBBR3 Perovskite纳米晶体从SF活性材料910 Bis苯基乙基苯基苯烯到CH3NH3PBBR3 Perovskite nanocrystals中的电荷转移动力学。我们观察到从bpea的耦合三重态向Picsecond TimeScale中CH3NH3PBBR3的传统带的电荷转移。在BPEA和CH3NH3PBBR3纳米晶体的混合物中观察到缩短的寿命证实了这些系统之间的显着电荷转移。我们的研究揭示了单线裂变钙钛矿复合材料中的电荷转移机制，这将有助于开发高级光伏系统。
Singlet fission process has gained considerable attention because of its potential to enhance photovoltaic efficiency and break the Shockley Queisser limit. In photovoltaic devices perovskite materials have shown tremendous progress in the last decade. Therefore combining the singlet fission materials in perovskite devices can lead to a drastic enhancement in their performance. To reveal the applicability of singlet fission processes in perovskite materials we have investigated the charge transfer dynamics from an SF active material 910 bis phenylethynyl anthracene to CH3NH3PbBr3 perovskite nanocrystals using the transient absorption spectroscopy. We observed a significant charge transfer from the coupled triplet state of BPEA to conduction band of CH3NH3PbBr3 in picosecond timescale. The observation of shortened lifetime in a mixture of BPEA and CH3NH3PbBr3 nanocrytals confirms the significant charge transfer between these systems. Our study reveals the charge transfer mechanism in singlet fission perovskite composite which will help to develop an advanced photovoltaic system.
