Retarding charge recombination in perovskite solar cells using ultrathin MgO-coated TiO2 nanoparticulate films

被引：173

作者：

Han, Gill Sang ^{[1
]}

Chung, Hyun Suk ^{[1
]}

Kim, Byeong Jo ^{[1
]}

Kim, Dong Hoe ^{[2
]}

Lee, Jin Wook ^{[3
,4
]}

Swain, Bhabani Sankar ^{[1
]}

Mahmood, Khalid ^{[1
]}

Yoo, Jin Sun ^{[1
]}

Park, Nam-Gyu ^{[3
,4
]}

Lee, Jung Heon ^{[1
,5
]}

Jung, Hyun Suk ^{[1
]}

机构：

[1] Sungkyunkwan Univ, Sch Adv Mat Sci & Engn, Suwon 440746, South Korea

[2] Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 151744, South Korea

[3] Sungkyunkwan Univ, Sch Chem Engn, Suwon 440746, South Korea

[4] Sungkyunkwan Univ, Dept Energy Sci, Suwon 440746, South Korea

[5] Sungkyunkwan Univ, SKKU Adv Inst Nanotechnol SAINT, Suwon 440746, South Korea

来源：

Journal of Materials Chemistry A | 2015年 / 3卷 / 17期

基金：

新加坡国家研究基金会;

关键词：

EFFICIENT; PERFORMANCE; CH3NH3PBI3; ELECTRODE; DEPOSITION; LENGTHS; NANOROD;

D O I：

10.1039/c4ta03684k

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

MgO-coated TiO2 nanoparticle (NP)-based electron collecting layers were fabricated to prevent charge recombination at the methylamine lead iodide/TiO2 interface in perovskite solar cells. The open circuit voltage (V-oc) and fill factor (ff) of perovskite solar cells based on MgO-coated TiO2 charge collectors were 0.89 V and 71.2%, respectively. These values were 4.7% and 6.1% higher than the pure TiO2 based perovskite solar cells. Transient photovoltage decay data exhibited recombination times for MgO-coated TiO2 NP-based perovskite solar cells about three times longer than those of TiO2 NP based solar cells. The longer recombination time was responsible for enhancing the V-oc and ff of MgO-coated TiO2 NP-based perovskite solar cells. By employing a MgO nanolayer, we observed that the power conversion efficiency (PCE) was increased from 11.4% to 12.7%, demonstrating that MgO ultrathin nanolayers are able to efficiently retard charge recombination in perovskite solar cells.

引用

页码：9160 / 9164

页数：5

共 21 条

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