Highly Efficient and Uniform 1 cm2 Perovskite Solar Cells with an Electrochemically Deposited NiOx Hole-Extraction Layer

Park, Ik Jae; Kang, Gyeongho; Park, Min Ah; Kim, Ju Seong; Seo, Se Won; Kim, Dong Hoe; Zhu, Kai; Park, Taiho; Kim, Jin Young

doi:10.1002/cssc.201700612

Highly Efficient and Uniform 1 cm² Perovskite Solar Cells with an Electrochemically Deposited NiO_x Hole-Extraction Layer

Journal Article · Wed May 10 00:00:00 EDT 2017 · ChemSusChem

DOI:https://doi.org/10.1002/cssc.201700612· OSTI ID:1369122

Park, Ik Jae ^[1]; Kang, Gyeongho ^[2]; Park, Min Ah ^[1]; Kim, Ju Seong ^[1]; Seo, Se Won ^[1]; Kim, Dong Hoe ^[3]; Zhu, Kai ^[3]; Park, Taiho ^[2]; Kim, Jin Young ^[1]

Seoul National Univ., Seoul (Republic of Korea)
Pohang Univ. of Science and Technology (POSTECH), Gyeongbuk (Republic of Korea)
National Renewable Energy Lab. (NREL), Golden, CO (United States)

Here, given that the highest certified conversion efficiency of the organic-inorganic perovskite solar cell (PSC) already exceeds 22%, which is even higher than that of the polycrystalline silicon solar cell, the significance of new scalable processes that can be utilized for preparing large-area devices and their commercialization is rapidly increasing. From this perspective, the electrodeposition method is one of the most suitable processes for preparing large-area devices because it is an already commercialized process with proven controllability and scalability. Here, a highly uniform NiO_x layer prepared by electrochemical deposition is reported as an efficient hole-extraction layer of a p-i-n-type planar PSC with a large active area of >1 cm². It is demonstrated that the increased surface roughness of the NiO_x layer, achieved by controlling the deposition current density, facilitates the hole extraction at the interface between perovskite and NiO_x, and thus increases the fill factor and the conversion efficiency. The electrochemically deposited NiO_x layer also exhibits extremely uniform thickness and morphology, leading to highly efficient and uniform large-area PSCs. As a result, the p-i-n-type planar PSC with an area of 1.084 cm² exhibits a stable conversion efficiency of 17.0% (19.2% for 0.1 cm²) without showing hysteresis effects.

View Accepted Manuscript (DOE)

Research Organization:: National Renewable Energy Lab. (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: AC36-08GO28308

OSTI ID:: 1369122

Report Number(s):: NREL/JA--5900-68709

Journal Information:: ChemSusChem, Journal Name: ChemSusChem Journal Issue: 12 Vol. 10; ISSN 1864-5631

Publisher:: ChemPubSoc EuropeCopyright Statement

Country of Publication:: United States

Language:: English

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