Interface inductive currents and carrier injection in hybrid perovskite single crystals
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Other documents of the author: Kovalenko, Alexander; Pospisil, Jan; Krajcovic, Jozef; Weiter, Martin; Guerrero, Antonio; Garcia-Belmonte, Germà
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Show full item recordcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/2507
comunitat-uji-handle3:10234/6973
comunitat-uji-handle4:
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Title
Interface inductive currents and carrier injection in hybrid perovskite single crystalsAuthor (s)
Date
2017-10Publisher
AIP PublishingISSN
0003-6951; 1077-3118Bibliographic citation
KOVALENKO, Alexander, et al. Interface inductive currents and carrier injection in hybrid perovskite single crystals. Applied Physics Letters, 2017, vol. 111, no 16Type
info:eu-repo/semantics/articlePublisher version
Applied Physics Letters, 2017, vol. 111, no 16Version
info:eu-repo/semantics/publishedVersionSubject
Abstract
nterfaces between the absorbing perovskite and transporting layers are gaining attention as the key locus that governs solar cell operation and long term performance. The interplay of ionic and electronic processes, ... [+]
nterfaces between the absorbing perovskite and transporting layers are gaining attention as the key locus that governs solar cell operation and long term performance. The interplay of ionic and electronic processes, along with the asymmetrical architecture of any solar cell, makes the interpretation of electrical measurements always inconclusive. A strategy to progress in relating electric responses, operating mechanisms, and device architecture relies upon simplifying the probing structure. Macroscopic CH3NH3PbBr3 single crystals with symmetrical contacts are tested by means of long-time current transient and impedance spectroscopy. It is observed that interfaces govern carrier injection to (and extraction from) perovskite layers through an inductive (negative capacitance) mechanism with a response time in the range of ∼1–1001–100 s under dark conditions and inert atmosphere. Current transient exhibits a slow recovering after the occurrence of an undershoot, signaling a complex carrier dynamics which involves changes in surface state occupancy. [-]
Investigation project
Ministerio de Economia y Competitividad (MINECO) of Spain / MAT2013-47192-C3-1-R; Generalitat Valenciana / Prometeo/2014/020; Czech Science Foundation, Czech Republic / GA165S01001Rights
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