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Optical detection of charge dynamics in CH3NH3PbI3/carbon nanotube composites
Nanoscale ( IF 6.7 ) Pub Date : 2017-09-27 00:00:00 , DOI: 10.1039/c7nr06136f Hajnalka M. Tóháti 1, 2, 3, 4, 5 , Áron Pekker 1, 2, 3, 4, 5 , Pavao Andričević 6, 7, 8, 9 , László Forró 6, 7, 8, 9 , Bálint Náfrádi 6, 7, 8, 9 , Márton Kollár 6, 7, 8, 9 , Endre Horváth 6, 7, 8, 9 , Katalin Kamarás 1, 2, 3, 4, 5
Nanoscale ( IF 6.7 ) Pub Date : 2017-09-27 00:00:00 , DOI: 10.1039/c7nr06136f Hajnalka M. Tóháti 1, 2, 3, 4, 5 , Áron Pekker 1, 2, 3, 4, 5 , Pavao Andričević 6, 7, 8, 9 , László Forró 6, 7, 8, 9 , Bálint Náfrádi 6, 7, 8, 9 , Márton Kollár 6, 7, 8, 9 , Endre Horváth 6, 7, 8, 9 , Katalin Kamarás 1, 2, 3, 4, 5
Affiliation
We have investigated the optical absorption of metallic and semiconducting carbon nanotubes/CH3NH3PbI3 micro- and nanowire composites. Upon visible light illumination semiconducting carbon nanotube based samples show a photo-induced doping, originating from the charge carriers created in the perovskite while this kind of change is absent in the composites containing metallic nanotubes, due to their strikingly different electronic structure. The response in the nanotubes shows, beside a fast diffusion of photo-generated charges, a slow component similar to that observed in pristine CH3NH3PbI3 attributed to structural rearrangement, and leading to slight, light induced changes of the optical gap of the perovskite. This charge transfer from the illuminated perovskite confirms that carbon nanotubes (especially semiconducting ones) can form efficient charge-transporting layers in the novel organometallic perovskite based optoelectronic devices.
中文翻译:
CH 3 NH 3 PbI 3 /碳纳米管复合材料中电荷动力学的光学检测
我们已经研究了金属和半导体碳纳米管/ CH 3 NH 3 PbI 3微米和纳米线复合材料的光吸收。在可见光照射下,基于半导体碳纳米管的样品显示出光诱导的掺杂,该掺杂源自钙钛矿中产生的电荷载流子,而包含金属纳米管的复合材料由于其显着不同的电子结构而没有这种变化。纳米管中的响应表明,除了光生电荷的快速扩散之外,还存在类似于原始CH 3 NH 3 PbI 3中的缓慢组分。归因于结构的重排,并导致轻微的光诱导钙钛矿光学间隙的变化。来自受照钙钛矿的这种电荷转移证实了碳纳米管(尤其是半导体纳米管)可以在新型的基于有机金属钙钛矿的光电器件中形成有效的电荷传输层。
更新日期:2017-11-23
中文翻译:
CH 3 NH 3 PbI 3 /碳纳米管复合材料中电荷动力学的光学检测
我们已经研究了金属和半导体碳纳米管/ CH 3 NH 3 PbI 3微米和纳米线复合材料的光吸收。在可见光照射下,基于半导体碳纳米管的样品显示出光诱导的掺杂,该掺杂源自钙钛矿中产生的电荷载流子,而包含金属纳米管的复合材料由于其显着不同的电子结构而没有这种变化。纳米管中的响应表明,除了光生电荷的快速扩散之外,还存在类似于原始CH 3 NH 3 PbI 3中的缓慢组分。归因于结构的重排,并导致轻微的光诱导钙钛矿光学间隙的变化。来自受照钙钛矿的这种电荷转移证实了碳纳米管(尤其是半导体纳米管)可以在新型的基于有机金属钙钛矿的光电器件中形成有效的电荷传输层。