Effect of hydroxyl groups in NiO$ _{x}$ on the open circuit voltage of lead iodide perovskite solar cells

Content Provider	Scilit
Author	Islam, Bodiul Pant, Namrata Yanagida, Masatoshi Shirai, Yasuhiro Miyano, Kenjiro
Copyright Year	2018
Description	Journal: Japanese Journal of Applied Physics The effect of NiO$ _{x}$ (0 < x) hole transport layer prepared by a radio-frequency sputtering method on the photovoltaic properties of planer-type $CH_{3}NH_{3}PbI_{3}$ perovskite solar cells (PVSCs) was investigated. The open circuit voltage of PVSC decreases with increasing applied power of the sputtering machine. The lack of hydroxyl groups on the surface of the metal oxides shifts the work function (WF) to higher energy levels. The X-ray photoelectron peaks of Ni $2p_{3/2}$ at 855.6 eV and O 1s at 531.3 eV assigned to ONi(OH) decrease with the increasing power. Therefore, the decrease in the number of hydroxyl groups must have shifted the WF to higher energy levels. The shunt resistance of current–voltage curve and the internal quantum efficiency of the PVSCs is independent of NiO$ _{x}$ prepared at various powers. Assuming that the recombination effect can be neglected, the open circuit voltage (V$ _{OC}$) decrease with increasing power is due to the shifted WF to higher energy levels.
Related Links	http://iopscience.iop.org/article/10.7567/JJAP.57.08RE06/pdf
ISSN	00214922
e-ISSN	13474065
DOI	10.7567/jjap.57.08re06
Journal	Japanese Journal of Applied Physics
Issue Number	8S3
Volume Number	57
Language	English
Publisher	IOP Publishing
Publisher Date	2018-07-10
Access Restriction	Open
Subject Keyword	Journal: Japanese Journal of Applied Physics Condensed Matter Physics Hydroxyl Groups Lead Iodide Open Circuit Circuit Voltage Perovskite Solar Iodide Perovskite Solar Cells
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Engineering