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Electrical Methods to Elucidate Charge Transport in Hybrid Perovskites Thin Films and Devices
The Chemical Record ( IF 6.6 ) Pub Date : 2019-12-13 , DOI: 10.1002/tcr.201900055
Mohd Taukeer Khan 1, 2 , Abdullah Almohammedi 2 , Samrana Kazim 1, 3 , Shahzada Ahmad 1, 3
Affiliation  

The panchromatic light absorption and excellent charge carrier transport properties in organo lead halide perovskites allowed to achieve an unprecedented power conversion efficiency in excess of 25 % for thin film photovoltaics fabrication. To understand the underlying phenomena, various comprehensive set of optical and electrical techniques have been employed to investigate the charge carrier dynamics in such devices. In this perspective, we aim to summarize the electrical transport properties of perovskite thin films by using (i) impedance spectroscopy (IS), (ii) space charge limited current (SCLC), (iii) field‐effect transistors (FETs) and (iv) time‐of‐flight (TOF) methods. We have deliberated various equivalent circuit used to model the perovskite solar cells by means of IS. The SCLC technique provide vital electrical parameters such as mobility, activation energy, traps density and distribution, carrier concentration, density of states, etc. The TOF technique measures mobility as a primary parameter while the FETs configuration provide a valuable insight into the in‐plane charge transport in perovskites thin films. We believe that these notable understanding will provide insights into charge carrier dynamics in perovskite materials and devices.

中文翻译:

阐明杂化钙钛矿薄膜和器件中电荷传输的电学方法

在有机卤化钙钛矿中的全色光吸收和出色的电荷载流子传输特性使得薄膜光伏制造能够实现前所未有的功率转换效率,超过25%。为了理解潜在的现象,已采用各种综合的光学和电气技术来研究此类设备中的载流子动力学。从这个角度出发,我们旨在通过使用(i)阻抗谱(IS),(ii)空间电荷限制电流(SCLC),(iii)场效应晶体管(FET)和(i)来概述钙钛矿薄膜的电传输特性。 iv)飞行时间(TOF)方法。我们已经研究了通过IS用来模拟钙钛矿太阳能电池的各种等效电路。SCLC技术提供了重要的电参数,例如迁移率,活化能,陷阱密度和分布,载流子浓度,状态密度等。TOF技术将迁移率作为主要参数进行测量,而FET配置则提供了对平面内的宝贵见解钙钛矿薄膜中的电荷传输。我们相信,这些显着的理解将为钙钛矿材料和器件中的载流子动力学提供深刻见解。
更新日期:2019-12-13
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