Ionic Dipolar Switching Hinders Charge Collection in Perovskite Solar Cells with Normal and Inverted Hysteresis

Almora Rodriguez O, Lopez-varo P, Cho KT, Aghazada S, Meng W, Hou Y, Echeverria-Arrondo C, Zimmermann I, Matt G, Jiménez-Tejada JA, Brabec C, Nazeeruddin MK, Garcia-Belmonte G (2019)

Publication Language: English

Publication Type: Journal article, Original article

Publication year: 2019

Journal

Solar Energy Materials and Solar Cells Elsevier

Book Volume: 195

Pages Range: 291-298

URI: https://www.sciencedirect.com/science/article/pii/S0927024819301102?via=ihub

DOI: 10.1016/j.solmat.2019.03.003

Abstract

Drift-diffusion modeling of the ionic dipole switching from the measurement of fast scanned and long pre-biased electrical response is proposed as a novel protocol for evaluation of limit hysteretic effects in perovskite solar cells. Up to eight systems were measured including CH3NH3PbI3, Cs0.1FA0.74MA0.13PbI2.48Br0.39 and FA0.83MA0.17Pb1.1Br0.22I2.98 3D perovskite absorbers, as well as 2D capping layers towards the selective contacts. We show systematic hysteretic patterns, even among typical hysteresis-free devices, including normal and inverted hysteresis as general dissimilar trend between CH3NH3PbI3 and mixed perovskite cells, respectively. Particularly, strong changes in the short-circuit current density (Jsc) were identified, in addition to different trends affecting the fill factor (FF) and the open-circuit voltage (Voc). The changes in Jsc were analyzed with state-of-the-art numerical drift-diffusion simulations concluding in an important reduction in the charge collection due to ionic distribution switching depending on the pre-biasing protocol and the type of absorbing perovskite. It is shown that mixed perovskites inhibit ionic dipolar switching. In addition, our calculi signal on the required conditions for the occurrence of inverted hysteresis and changes in the  Voc. Regarding the FF and Voc  patterns a new empirical approach is introduced and corresponding interpretations are proposed. 

Authors with CRIS profile

Osbel Almora Rodriguez Institute Materials for Electronics and Energy Technology (i-MEET) Wei Meng Institute Materials for Electronics and Energy Technology (i-MEET) Yi Hou Institute Materials for Electronics and Energy Technology (i-MEET) Gebhard Matt Institute Materials for Electronics and Energy Technology (i-MEET) Christoph Brabec Institute Materials for Electronics and Energy Technology (i-MEET)

Additional Organisation(s)

Erlangen Graduate School in Advanced Optical Technologies

Related research project(s)

PV-ZUM - DynaSol/ Transientes photolelektronisches Messverfahren (DynaSolar) May 1, 2017 - July 31, 2020

Involved external institutions

École Polytechnique Fédérale de Lausanne (EPFL) CH Switzerland (CH) Universidad de Granada ES Spain (ES) Universitat Jaume I (UJI) ES Spain (ES)

How to cite

APA:

Almora Rodriguez, O., Lopez-varo, P., Cho, K.T., Aghazada, S., Meng, W., Hou, Y.,... Garcia-Belmonte, G. (2019). Ionic Dipolar Switching Hinders Charge Collection in Perovskite Solar Cells with Normal and Inverted Hysteresis. Solar Energy Materials and Solar Cells, 195, 291-298. https://dx.doi.org/10.1016/j.solmat.2019.03.003

MLA:

Almora Rodriguez, Osbel, et al. "Ionic Dipolar Switching Hinders Charge Collection in Perovskite Solar Cells with Normal and Inverted Hysteresis." Solar Energy Materials and Solar Cells 195 (2019): 291-298.

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