DataVXACS Energy LettersPaper
journal article·2017-07-14Open access

Microscopic Analysis of Inherent Void Passivation in Perovskite Solar Cells

Gabseok Seo, Dongwook Lee, Sung Heo, Minsu Seol, Yonghui Lee, Kihong Kim, Seong Heon Kim, Jooho Lee, Dongho Lee, Jaehan Lee, Dong Wook Kwak, Dongwha Lee, Hoon Young Cho, Jucheol Park, Tae Kyu Ahn, Mohammad Khaja Nazeeruddin

ACS Energy Letters· Volume 2· Issue 7
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Source abstract

Abstract

The presence of voids in perovskite solar cells influences the efficiency because of accelerated charge recombination. The induced electric field near voids due to band bending attracts photogenerated electrons and holes toward the voids, leading to carrier recombination. However, if the surface of the voids is coated by materials with a band gap higher than that of the perovskite layer, the strong electric field induced near the voids in the opposite way prevents carriers from recombining. We identified voids in the perovskite layer by using an electron beam-induced current technique and found the influence of field-assisted passivation by organic materials on the efficiency of the solar cell.
Source: openalex_inverted_index · Quality: baseline

Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Chalcogenide Semiconductor Thin Films · Quantum Dots Synthesis And Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Energy Science, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon 16419, Korea

Samsung Advanced Institute of Technology, 130, Samsung-ro, Yeongtong-gu, Suwon 16678, Korea

Group for Molecular Engineering of Functional Materials, EPFL Valais Wallis, CH-1951 Sion, Switzerland

Department of Physics, Dongguk University, Seoul 04620, Korea

Business Support Department, Gumi Electrons & Information Technology Research Institute, Gumi 39171, Korea

Funding

Rural Development Administration · National Research Council of Science and Technology

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