Small Molecule Passivation Leading to Efficient Hole Transport Layer-Free Sn–Pb Mixed Perovskite Solar Cells with High Open-Circuit Voltage

Hu，Hang1,2,3,4; Zhang，Jiyao1,3,4; Huang，Yulan1; Wang，Deng1,3,4; Li，Dongyang1; Chen，Jiabang1,3,4; Wu，Jiawen1,3,4; Zhang，Luozheng1,3,4,5; Zhou，Xianyong1,3,4; Hu，Bihua1,3,4; Wang，Xingzhu5,6; Ouyang，Jianyong2; Xu，Baomin1,3,4

2022

10.1002/solr.202200721

Solar RRL   Impact Factor & Quartile

2367-198X

2367-198X

There have been a number of remarkable signs of progress achieved in tin–lead mixed narrow-bandgap perovskite solar cells (PSCs) due to the high theoretical power conversion efficiency (PCE) and their promising application in tandem devices. Indeed, Sn–Pb mixed PSCs without a hole transport layer (HTL) also have been more attractive owing to lower cost and simplification of the device structure. However, the defects in perovskite film introduced by Sn oxidation severely restrict device efficiency and stability.Herein, a small organic molecule, 4,4'-sulfonyldiphenol, is employed to passivate perovskite (E = 1.26 eV) surface to decrease the interfacial defects and suppress the nonradiative carrier recombination. Furthermore, by regulating energy-level alignment, charge carrier extraction is greatly facilitated. The device performance is significantly enhanced in that the champion PCE is enlarged to 21.43% with an open-circuit voltage (V) of 0.876 V from only 18.02% with a V of 0.770 V. The stability of unencapsulated devices is improved substantially as well while retaining 80% PCE of its initial value after being stored in the glovebox for around 600 h. This facile but highly effective strategy successfully proposes the promising development of HTL-free Sn–Pb mixed PSCs.

high open-circuit voltage hole transport layer-free solar cells perovskite solar cells surface passivation tin–lead mixed perovskites

SCI

English

First ; Corresponding

Guangdong Basic and Applied Basic Research Foundation[2019B1515120083] ; National Key Research and Development Project from the Ministry of Science and Technology of China["2021YFB3800100","2021YFB3800101","2021YFE0191500"] ; National Natural Science Foundation of China[U19A2089] ; Key Fundamental Research Project from the Shenzhen Science and Technology Innovation Committee[JCYJ20200109141014474] ; Guangdong-Hong Kong-Macao Joint Laboratory[2019B121205001]

Energy & Fuels ; Materials Science

Energy & Fuels ; Materials Science, Multidisciplinary

WOS:000876314400001

WILEY-V C H VERLAG GMBH

2-s2.0-85141223242

Scopus

1.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.Department of Materials Science and Engineering,National University of Singapore,Singapore,117576,Singapore
3.Key University Laboratory of Highly Efficient Utilization of Solar Energy and Sustainable Development of Guangdong,Southern University of Science and Technology,Shenzhen,518055,China
4.Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices,Southern University of Science and Technology,Shenzhen,518055,China
5.SUSTech Academy for Advanced Interdisciplinary Studies,Southern University of Science and Technology,Shenzhen,518055,China
6.Shenzhen Putai Technology Co.,Ltd.,Shenzhen,Longhua District,518000,China

Hu，Hang,Zhang，Jiyao,Huang，Yulan,等. Small Molecule Passivation Leading to Efficient Hole Transport Layer-Free Sn–Pb Mixed Perovskite Solar Cells with High Open-Circuit Voltage[J]. Solar RRL,2022.

Hu，Hang.,Zhang，Jiyao.,Huang，Yulan.,Wang，Deng.,Li，Dongyang.,...&Xu，Baomin.(2022).Small Molecule Passivation Leading to Efficient Hole Transport Layer-Free Sn–Pb Mixed Perovskite Solar Cells with High Open-Circuit Voltage.Solar RRL.

Hu，Hang,et al."Small Molecule Passivation Leading to Efficient Hole Transport Layer-Free Sn–Pb Mixed Perovskite Solar Cells with High Open-Circuit Voltage".Solar RRL (2022).