Effect of ZnO surface defects on efficiency and stability of ZnO-based perovskite solar cells

Liu, Fangzhou1; Wong, Man Kwong1; Tam, Ho Won1; Djurisic, Aleksandra B.1; Ng, Alan. M. C.2; Chan, Wai Kin3

10.1117/12.2251885

2017

1996756X

OXIDE-BASED MATERIALS AND DEVICES VIII

10105

San Francisco, CA, United states

1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA

SPIE-INT SOC OPTICAL ENGINEERING

ZnO as an alternative electron transport layer (ETL) material for perovskite solar cell applications has drawn increasing research interest due to its comparable energy levels to TiO2, relatively high electron mobility, as well as its feasibility to be processed at low temperatures for potential applications in flexible devices. Nevertheless, ZnO based perovskite devices usually exhibit inferior performance and severe stability drawbacks which are related to the surface defects of ZnO ETL. In this study, to investigate the correlation between ZnO defect composition and resulting device performance, different approaches of preparing ZnO ETL are compared in terms of the perovskite morphology and device performance. In addition, direct manipulations of ZnO surface defects are performed by various surface treatments, and the photovoltaic performance of devices with ZnO ETL subjected to different surface treatments is compared. Surface modification of ZnO ETL by ethanolamine (EA) is demonstrated to efficiently enhance the photovoltaic performance of resulting ZnO based devices.

perovskite zinc oxide solar cells surface treatment

其他

英语

CPCI-S ; EI

ECF[35/2015]

Optics

Optics

WOS:000405598700024

20172103696261

Electron transport properties ; II-VI semiconductors ; Perovskite ; Perovskite solar cells ; Solar cells ; Surface treatment ; Titanium dioxide ; Zinc oxide

Minerals:482.2 ; Solar Cells:702.3 ; Inorganic Compounds:804.2 ; Materials Science:951

Web of Science

1.Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China
2.South Univ Sci & Technol China, Dept Phys, Shenzhen, Peoples R China
3.Univ Hong Kong, Dept Chem, Hong Kong, Hong Kong, Peoples R China

Liu, Fangzhou,Wong, Man Kwong,Tam, Ho Won,et al. Effect of ZnO surface defects on efficiency and stability of ZnO-based perovskite solar cells[C]. 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA:SPIE-INT SOC OPTICAL ENGINEERING,2017.