Cu/Cu2 O nanocomposite films as a p-type modified layer for efficient perovskite solar cells

Scientific Reports
You-Jyun ChenPeter Chen

Abstract

Cu/Cu2O films grown by ion beam sputtering were used as p-type modified layers to improve the efficiency and stability of perovskite solar cells (PSCs) with an n-i-p heterojunction structure. The ratio of Cu to Cu2O in the films can be tuned by the oxygen flow ratio (O2/(O2 + Ar)) during the sputtering of copper. Auger electron spectroscopy was performed to determine the elemental composition and chemical state of Cu in the films. Ultraviolet photoelectron spectroscopy and photoluminescence spectroscopy revealed that the valence band maximum of the p-type Cu/Cu2O matches well with the perovskite. The Cu/Cu2O film not only acts as a p-type modified layer but also plays the role of an electron blocking buffer layer. By introducing the p-type Cu/Cu2O films between the low-mobility hole transport material, spiro-OMeTAD, and the Ag electrode in the PSCs, the device durability and power conversion efficiency (PCE) were effectively improved as compared to the reference devices without the Cu/Cu2O interlayer. The enhanced PCE is mainly attributed to the high hole mobility of the p-type Cu/Cu2O film. Additionally, the Cu/Cu2O film serves as a protective layer against the penetration of humidity and Ag into the perovskite active layer.

References

Jun 30, 2005·Journal of the American Chemical Society·Ming YinStephen O'Brien
Apr 16, 2009·Journal of the American Chemical Society·Akihiro KojimaTsutomu Miyasaka
Apr 8, 2009·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Chinping ChenYadong Li
Dec 20, 2013·Journal of the American Chemical Society·Jeffrey A ChristiansPrashant V Kamat
Nov 20, 2014·Dalton Transactions : an International Journal of Inorganic Chemistry·Zonghao LiuHongshan He
Jun 25, 2015·Nature Communications·Christopher EamesM Saiful Islam
Jan 2, 2016·The Journal of Physical Chemistry Letters·Stephan van ReenenHenry J Snaith
Jan 11, 2016·ChemSusChem·Bahram Abdollahi NejandHamid Reza Shahverdi
Sep 18, 2016·Nanoscale Research Letters·Lung-Chieh ChenChun-Guey Wu
Oct 16, 2016·Angewandte Chemie·Laura CalióShahzada Ahmad

❮ Previous
Next ❯

Citations

Mar 13, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Sriparna ChatterjeeSuddhasatwa Basu
Sep 9, 2020·ACS Applied Materials & Interfaces·Jesus Eduardo Castellanos-ÁguilaPerla Wahnón

❮ Previous
Next ❯

Methods Mentioned

BETA
X-ray
scanning electron microscopy
Auger
electron spectroscopy

Related Concepts

Related Feeds

Adult Stem Cells

Adult stem cells reside in unique niches that provide vital cues for their survival, self-renewal, and differentiation. They hold great promise for use in tissue repair and regeneration as a novel therapeutic strategies. Here is the latest research.