Fused-ring electron acceptor as an efficient interfacial material for planar and flexible perovskite solar cells

Li，Ming1; Du，Binbin1; Wu，Yinghao1; Dai，Shijie1; Zheng，Lingling1; Gao，Chao2; Wang，Yuanhao3; Yun，Daqin1

2021-11-01

10.1016/j.orgel.2021.106293

ORGANIC ELECTRONICS   影响因子和分区

1566-1199

1878-5530

Perovskite solar cell (PSC) has attracted great attention due to its high power conversion efficiency (PCE), low cost and solution processability. The well-designed interface and the modification of electron transport layer (ETL) are critical to the PCE and long-term stability of PSCs. In this article, a fused-ring electron acceptor is employed as the interfacial material between TiO and the perovskite in rigid and flexible PSCs. The modification improves the surface of TiO, which decreases the defects of ETL surface. Moreover, the modified surface has lower hydrophilicity, and thus is beneficial to the growth of perovskite with large grain size and high quality. As a result, the interfacial charge transfer is promoted and the interfacial charge recombination can be suppressed. The highest PCE of 19.61% is achieved for the rigid PSCs after the introduction of ITIC, and the hysteresis effect is significantly reduced. Flexible PSC with ITIC obtains a PCE of 14.87%, and the device stability is greatly improved. This study provides an efficient candidate as the interfacial modifier for PSCs, which is compatible with low-temperature solution process and has a great practical potential for the commercialization of PSCs.

Fused-ring electron acceptor Interfacial modification ITIC Perovskite solar cells

SCI ; EI

英语

其他

National Natural Science Foundation of China[61605164,61705258] ; Fundamental Research Funds for the Central Universities[20720190027]

Materials Science ; Physics

Materials Science, Multidisciplinary ; Physics, Applied

WOS:000686903100014

ELSEVIER

20213010670516

Charge transfer ; Electron ring accelerators ; Electron transport properties ; Perovskite ; Temperature ; Titanium dioxide

Minerals:482.2 ; Thermodynamics:641.1 ; Solar Cells:702.3 ; Chemical Reactions:802.2 ; Inorganic Compounds:804.2 ; Particle Accelerators:932.1.1

PHYSICS

2-s2.0-85110630065

Scopus

1.School of Energy,Xiamen University,Xiamen,361102,China
2.Xi'an Modern Chemistry Research Institute,Xi'an,710065,China
3.SUSTech Engineering Innovation Center,School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Li，Ming,Du，Binbin,Wu，Yinghao,et al. Fused-ring electron acceptor as an efficient interfacial material for planar and flexible perovskite solar cells[J]. ORGANIC ELECTRONICS,2021,98.

Li，Ming.,Du，Binbin.,Wu，Yinghao.,Dai，Shijie.,Zheng，Lingling.,...&Yun，Daqin.(2021).Fused-ring electron acceptor as an efficient interfacial material for planar and flexible perovskite solar cells.ORGANIC ELECTRONICS,98.

Li，Ming,et al."Fused-ring electron acceptor as an efficient interfacial material for planar and flexible perovskite solar cells".ORGANIC ELECTRONICS 98(2021).