Solution-Processible Crystalline NiO Nanoparticles for High-Performance Planar Perovskite Photovoltaic Cells

Kwon, Uisik and Kim, Bong-Gi and Nguyen, Duc Cuong and Park, Jong-Hyeon and Ha, Na Young and Kim, Seung-Joo and Ko, Seung Hwan and Lee, Soonil and Lee, Daeho and Park, Hui Joon (2016) Solution-Processible Crystalline NiO Nanoparticles for High-Performance Planar Perovskite Photovoltaic Cells. Scientific Reports, 6 (30759). pp. 1-5. ISSN 2045-2322

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Abstract

In this work, we report on solution-based p-i-n-type planar-structured CH3NH3PbI3 perovskite photovoltaic (PV) cells, in which pre-crystallized NiO nanoparticles (NPs) without post-treatment are used to form a hole transport layer (HTL). X-ray diffraction and high-resolution transmission electron microscopy showed the crystallinity of the NPs, and atomic force microscopy and scanning electron microscopy confirmed the uniform surfaces of the resultant NiO thin film and the subsequent perovskite photoactive layer. Compared to the conventional poly(3,4-ethylene dioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) HTL, the NiO HTL had excellent energy-level alignment with that of CH3NH3PbI3 and improved electron-blocking capability, as analyzed by photoelectron spectroscopy and diode modeling, resulting in Voc ~0.13 V higher than conventional PEDOT:PSS-based devices. Consequently, a power conversion efficiency (PCE) of 15.4% with a high fill factor (FF, 0.74), short-circuit current density (Jsc, 20.2 mA·cm−2), and open circuit voltage (Voc, 1.04 V) having negligible hysteresis and superior air stability has been achieved.

Item Type:	Article
Subjects:	Scopus-indexed journals ISI-indexed journals
Divisions:	Faculty of Engineering Physics and Nanotechnology (FEPN)
Depositing User:	Dr. Duc Cuong Nguyen
Date Deposited:	15 Nov 2018 09:19
Last Modified:	15 Nov 2018 09:19
URI:	http://eprints.uet.vnu.edu.vn/eprints/id/eprint/3019

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