Highly-Crystalline SnO2 Thin Films for Efficient Planar Perovskite Solar Cells

Huang，Chun1; Huang，Chuanwei2; Ni，Yiqun1; Lin，Peng2; Fu，Nianqing3; Fan，Bo1; Xu，Baomin4; Zhang，Wenfei1

2022-04-01

10.1021/acsaem.1c04094

ACS Applied Energy Materials   影响因子和分区

2574-0962

Due to the excellent properties of wide band gap, high bulk carrier mobility, and suitable band alignment with a perovskite layer, tin dioxide SnO2 is an outstanding candidate as an electron transport layer (ETL) for perovskite solar cells (PSCs). However, it is still desirable and challenging to deposit crystalline SnO2 thin films by the low-temperature solution process. By adjusting the metal-halide chemical bonding strength of a tin precursor, thus controlling the hydrolysis intermediate species, we demonstrated a simple method for preparing high-quality SnO2 thin films. This method is free of organic surfactants and the formation of tin-alkoxide intermediates. Consequently, SnO2 thin films with high crystallinity and high-carrier-mobility can be obtained under low temperature. This crystalline SnO2 ETL enables efficient charge separation/transport and reduces charge recombination in PSCs. Moreover, the Br-rich perovskite region is established near the SnO2/perovskite interface, resulting in a beneficial gradient band gap profile in the device. PSCs with this SnO2 ETL show a PCE of over 22% with an outstandingly high fill factor of 83.32%.

perovskite solar cells SnO2 colloids electron transporting layer ultrathin low-temperature process well-crystalline aqueous sol-gel

SCI ; EI

英语

其他

National Nature Science Foundation of China[61875127] ; Science and Technology I n n o v a t i o n Comm i s s i o n of S h e n z h e n[JCYJ20180305124706833]

Chemistry ; Energy & Fuels ; Materials Science

Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary

WOS:000823338100001

AMER CHEMICAL SOC

20221812069595

Carrier mobility ; Chemical bonds ; Crystallinity ; Electron transport properties ; Energy gap ; Metal halides ; organic-inorganic materials ; Perovskite ; Sol-gel process ; Sol-gels ; Temperature ; Tin dioxide ; Ultrathin films

Minerals:482.2 ; Thermodynamics:641.1 ; Solar Cells:702.3 ; Semiconducting Materials:712.1 ; Physical Chemistry:801.4 ; Chemical Products Generally:804 ; Inorganic Compounds:804.2 ; Glass:812.3 ; Crystalline Solids:933.1

2-s2.0-85129261113

Web of Science

1.Shenzhen Key Laboratory of Laser Engineering,College of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen,518060,China
2.College of Materials Science and Engineering,Shenzhen University,Shenzhen,518060,China
3.School of Materials Science and Engineering,South China University of Technology,Guangzhou,510640,China
4.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518060,China

Huang，Chun,Huang，Chuanwei,Ni，Yiqun,et al. Highly-Crystalline SnO2 Thin Films for Efficient Planar Perovskite Solar Cells[J]. ACS Applied Energy Materials,2022,5(5).

Huang，Chun.,Huang，Chuanwei.,Ni，Yiqun.,Lin，Peng.,Fu，Nianqing.,...&Zhang，Wenfei.(2022).Highly-Crystalline SnO2 Thin Films for Efficient Planar Perovskite Solar Cells.ACS Applied Energy Materials,5(5).

Huang，Chun,et al."Highly-Crystalline SnO2 Thin Films for Efficient Planar Perovskite Solar Cells".ACS Applied Energy Materials 5.5(2022).