Ionic migration induced loss analysis of perovskite solar cells: a poling study

Zheng, Xue1; Ming, Wenjie1,2,3; Liu, Pingping1; Zhang, Jie1; Zhou, Hongfei1; Chen, Ming1; Li, Weimin1; Huang, Boyuan4; Wang, Huan5; Yang, Chunlei1

2022-02-01

10.1039/d1cp05450c

PHYSICAL CHEMISTRY CHEMICAL PHYSICS   影响因子和分区

1463-9076

1463-9084

Understanding the interplay between ionic migration and defect trapping in photovoltaic perovskites is critical to develop targeted passivation techniques for performance enhancement. In this study, systematic poling experiments on Cs-0.05(FA(0.85)MA(0.15))(0.95)Pb(I0.85Br0.15)(3) perovskite solar cells (PSCs) were conducted to resolve the principal effects of bias dependent pretreatment effects due to dynamic ionic migration. We find that under negative polarizations, iodine ion accumulation at perovskite/electron transport layer (ETL) interfaces causes enhanced global non-radiative recombination in PSCs and significant open-circuit voltage (V-oc) losses. On the other hand, dramatic short-circuit current (J(sc)) reduction occurs in positively polarized devices, which is ascribed to ineffective charge collection due to modified band-bending towards both charge transport materials. Spatiotemporally scanning probe microscopy on the surface of polarized perovskites provides an in situ estimation of iodine diffusion mobility and visualization of reorganizations under an external bias. Moreover, our findings suggest that the precondition effect of PSCs under operation due to defect ions is recoverable, therefore achieving a respectable lifetime of PSCs for commercialization is promising.

SCI ; EI

英语

通讯

National Natural Science Foundation of China[52003288,52002393] ; National Key R&D Program of China[2018YFB1500200] ; Fundamental Research Funds for the Central Universities[JZ2021HGQA0191] ; Shenzhen Science and Technology Program["JCYJ20210324101801004","JCYJ20200109114801744","JCYJ20190807161001747","JCYJ201805-07182431967","JCYJ20180507182257563"]

Chemistry ; Physics

Chemistry, Physical ; Physics, Atomic, Molecular & Chemical

WOS:000770044600001

ROYAL SOC CHEMISTRY

20221511939123

Bromine compounds ; Iodine ; Lead compounds ; Open circuit voltage ; Perovskite ; Scanning probe microscopy

Minerals:482.2 ; Solar Cells:702.3 ; Chemistry:801 ; Chemical Products Generally:804

CHEMISTRY

Web of Science

1.Chinese Acad Sci, Shenzhen Inst Adv Technol, Shenzhen 518055, Peoples R China
2.Xiangtan Univ, Minist Educ, Key Lab Low Dimens Mat & Applicat Technol, Xiangtan 411105, Hunan, Peoples R China
3.Xiangtan Univ, Sch Mat Sci & Engn, Xiangtan 411105, Hunan, Peoples R China
4.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
5.Hefei Univ Technol, Sch Elect Engn & Automat, Hefei 230009, Peoples R China

Zheng, Xue,Ming, Wenjie,Liu, Pingping,et al. Ionic migration induced loss analysis of perovskite solar cells: a poling study[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2022,24:7805-7814.

Zheng, Xue.,Ming, Wenjie.,Liu, Pingping.,Zhang, Jie.,Zhou, Hongfei.,...&Yang, Chunlei.(2022).Ionic migration induced loss analysis of perovskite solar cells: a poling study.PHYSICAL CHEMISTRY CHEMICAL PHYSICS,24,7805-7814.

Zheng, Xue,et al."Ionic migration induced loss analysis of perovskite solar cells: a poling study".PHYSICAL CHEMISTRY CHEMICAL PHYSICS 24(2022):7805-7814.