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Authors = Danila Saranin

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14 pages, 8605 KB  
Article
Copper Iodide Interlayer for Improved Charge Extraction and Stability of Inverted Perovskite Solar Cells
by Danila Saranin, Pavel Gostischev, Dmitry Tatarinov, Inga Ermanova, Vsevolod Mazov, Dmitry Muratov, Alexey Tameev, Denis Kuznetsov, Sergey Didenko and Aldo Di Carlo
Materials 2019, 12(9), 1406; https://doi.org/10.3390/ma12091406 - 30 Apr 2019
Cited by 50 | Viewed by 10755
Abstract
Nickel oxide (NiO) is one of the most promising and high-performing Hole Transporting Layer (HTL) in inverted perovskite solar cells due to ideal band alignment with perovskite absorber, wide band gap, and high mobility of charges. At the same time, however, NiO does [...] Read more.
Nickel oxide (NiO) is one of the most promising and high-performing Hole Transporting Layer (HTL) in inverted perovskite solar cells due to ideal band alignment with perovskite absorber, wide band gap, and high mobility of charges. At the same time, however, NiO does not provide good contact and trap-free junction for hole collection. In this paper, we examine this problem by developing a double hole transport configuration with a copper iodide (CuI) interlayer for efficient surface passivation. Transient photo-current (TPC) measurements showed that Perovskite/HTL interface with CuI interlayer has an improved hole injection; CuI passivation reduces the concentration of traps and the parasitic charge accumulation that limits the flow of charges. Moreover, we found that CuI protect the HTL/perovskite interface from degradation and consequently improve the stability of the cell. The presence of CuI interlayer induces an improvement of open-circuit voltage VOC (from 1.02 V to 1.07 V), an increase of the shunt resistance RSH (100%), a reduction of the series resistance RS (−30%), and finally a +10% improvement of the solar cell efficiency. Full article
(This article belongs to the Special Issue Interface Engineering in Organic/Inorganic Hybrid Solar Cells)
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