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

doi:10.1021/acsenergylett.7b00484

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

Department of Physics

Sungkyunkwan University
Samsung
Swiss Federal Institute of Technology Lausanne
Dongguk University
Gumi Electrons and Information Technology Research Institute

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

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.

Original language	English
Pages (from-to)	1705-1710
Number of pages	6
Journal	ACS Energy Letters
Volume	2
Issue number	7
DOIs	https://doi.org/10.1021/acsenergylett.7b00484
State	Published - 14 Jul 2017

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10.1021/acsenergylett.7b00484

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title = "Microscopic Analysis of Inherent Void Passivation in Perovskite Solar Cells",

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.",

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

note = "Publisher Copyright: {\textcopyright} 2017 American Chemical Society.",

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doi = "10.1021/acsenergylett.7b00484",

language = "English",

volume = "2",

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journal = "ACS Energy Letters",

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T1 - Microscopic Analysis of Inherent Void Passivation in Perovskite Solar Cells

AU - Seo, Gabseok

AU - Lee, Dongwook

AU - Heo, Sung

AU - Seol, Minsu

AU - Lee, Yonghui

AU - Kim, Kihong

AU - Kim, Seong Heon

AU - Lee, Jooho

AU - Lee, Dongho

AU - Lee, Jaehan

AU - Kwak, Dong Wook

AU - Lee, Dongwha

AU - Cho, Hoon Young

AU - Park, Jucheol

AU - Ahn, Tae Kyu

AU - Nazeeruddin, Mohammad Khaja

PY - 2017/7/14

Y1 - 2017/7/14

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/85033687559

U2 - 10.1021/acsenergylett.7b00484

DO - 10.1021/acsenergylett.7b00484

M3 - Article

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SN - 2380-8195

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SP - 1705

EP - 1710

JO - ACS Energy Letters

JF - ACS Energy Letters

IS - 7

ER -

Microscopic Analysis of Inherent Void Passivation in Perovskite Solar Cells

Abstract

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