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Title: Upconversion Er-doped TiO2 nanorod arrays for perovskite solar cells and the performance improvement

Abstract

Highlights: • Er-doped TiO{sub 2} nanorod absorbs IR and converts into visible light. • The introduction of Er could make a positive shift in flat-band potential. • Er-doped TiO{sub 2} solar cells show a 20% increment in the current density. - Abstract: Upconversion erbium-doped rutile TiO{sub 2} nanorod arrays were synthesized by a facile process and applied in perovskite solar cells (PSCs). The structure was characterized by X-ray powder diffraction (XRD). Energy dispersive spectrometer (EDS) and Tauc plot indicated that Er was successfully introduced and changed TiO{sub 2} band gap from 3.00 eV to 3.07 eV. The incorporation of Er shifts the flat band potential positively and enhances the electron density. The Er-doped TiO{sub 2} nanorods have a broad absorption in the infrared light and up-convert it into visible light, which provides a possibility for PSCs to use NIR light for higher performance. A higher photocurrent density (J{sub sc}) of 22.97 mA/cm{sup 2} and a power conversion efficiency (PCE) of 10.6% were obtained, showing 20% and 16.5% increment in J{sub sc} and PCE, respectively, when compared with the un-doped device. The performance improvement was ascribed to the upconversion performance, enhanced electron-injection efficiency and reduced charge recombination.

Authors:
; ; ; ; ;  [1]
  1. State Key Laboratory of Materials-Oriented Chemical Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, College of Chemistry and Chemical Engineering, Nanjing Tech University (former Nanjing University of Technology), 5 Xinmofan Road, Nanjing, 210009 (China)
Publication Date:
OSTI Identifier:
22805244
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 106; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; 14 SOLAR ENERGY; ABSORPTION; CURRENT DENSITY; DOPED MATERIALS; ELECTRON BEAM INJECTION; ELECTRON DENSITY; ENERGY CONVERSION; ENERGY EFFICIENCY; ERBIUM; INFRARED RADIATION; NANOSTRUCTURES; PERFORMANCE; PEROVSKITE; PHOTOCURRENTS; RUTILE; SOLAR CELLS; SPECTROMETERS; TITANIUM OXIDES; VISIBLE RADIATION; X-RAY DIFFRACTION

Citation Formats

Zhang, Heng, Zhang, Qingsong, Lv, Yanqi, Yang, Chao, Chen, Huanhuan, and Zhou, Xingfu. Upconversion Er-doped TiO2 nanorod arrays for perovskite solar cells and the performance improvement. United States: N. p., 2018. Web. doi:10.1016/J.MATERRESBULL.2018.06.014.
Zhang, Heng, Zhang, Qingsong, Lv, Yanqi, Yang, Chao, Chen, Huanhuan, & Zhou, Xingfu. Upconversion Er-doped TiO2 nanorod arrays for perovskite solar cells and the performance improvement. United States. https://doi.org/10.1016/J.MATERRESBULL.2018.06.014
Zhang, Heng, Zhang, Qingsong, Lv, Yanqi, Yang, Chao, Chen, Huanhuan, and Zhou, Xingfu. Mon . "Upconversion Er-doped TiO2 nanorod arrays for perovskite solar cells and the performance improvement". United States. https://doi.org/10.1016/J.MATERRESBULL.2018.06.014.
@article{osti_22805244,
title = {Upconversion Er-doped TiO2 nanorod arrays for perovskite solar cells and the performance improvement},
author = {Zhang, Heng and Zhang, Qingsong and Lv, Yanqi and Yang, Chao and Chen, Huanhuan and Zhou, Xingfu},
abstractNote = {Highlights: • Er-doped TiO{sub 2} nanorod absorbs IR and converts into visible light. • The introduction of Er could make a positive shift in flat-band potential. • Er-doped TiO{sub 2} solar cells show a 20% increment in the current density. - Abstract: Upconversion erbium-doped rutile TiO{sub 2} nanorod arrays were synthesized by a facile process and applied in perovskite solar cells (PSCs). The structure was characterized by X-ray powder diffraction (XRD). Energy dispersive spectrometer (EDS) and Tauc plot indicated that Er was successfully introduced and changed TiO{sub 2} band gap from 3.00 eV to 3.07 eV. The incorporation of Er shifts the flat band potential positively and enhances the electron density. The Er-doped TiO{sub 2} nanorods have a broad absorption in the infrared light and up-convert it into visible light, which provides a possibility for PSCs to use NIR light for higher performance. A higher photocurrent density (J{sub sc}) of 22.97 mA/cm{sup 2} and a power conversion efficiency (PCE) of 10.6% were obtained, showing 20% and 16.5% increment in J{sub sc} and PCE, respectively, when compared with the un-doped device. The performance improvement was ascribed to the upconversion performance, enhanced electron-injection efficiency and reduced charge recombination.},
doi = {10.1016/J.MATERRESBULL.2018.06.014},
url = {https://www.osti.gov/biblio/22805244}, journal = {Materials Research Bulletin},
issn = {0025-5408},
number = ,
volume = 106,
place = {United States},
year = {2018},
month = {10}
}