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Title: Effect of TiO2 particle size and layer thickness on mesoscopic perovskite solar cells

Journal Article · · Applied Surface Science
 [1];  [2];  [1];  [3];  [1];  [2];  [4];  [1]
  1. Sungkyunkwan Univ., Suwon (Republic of Korea)
  2. Seoul National Univ. (Korea, Republic of); Global Frontier Center for Multiscale Energy Systems, Seoul (Korea, Republic of)
  3. National Renewable Energy Lab. (NREL), Golden, CO (United States)
  4. Kyungpook National Univ., Daegu (Korea, Republic of)

Mesoporous TiO2 (mp-TiO2) layers are commonly used as electron transport layers in perovskite solar cells, which help to extract electrons from the perovskite light-absorbing layer and transport them to the electrodes. We investigated the effects of the layer thickness of mp-TiO2 and particle size of TiO2 on photovoltaic properties, in terms of the surface area of the mp-layer and the interfacial areas of the TiO2 nanoparticles in the mp-layer. Various mp-TiO2 layers with thicknesses of 150, 250, and 400 nm and particle sizes of 25 nm and 41 nm were prepared to compare the photovoltaic properties of such layer-containing perovskite solar cells. Time-resolved photoluminescence decay and impedance studies showed that interfacial resistance as well as perovskite-to-TiO2 charge injection are important factors affecting photovoltaic performance. The deterioration of the photovoltaic parameters with increasing TiO2/TiO2 interfacial area also confirms that the interfacial series resistance that arises from these connections should be reduced to enhance the performance of mesoscopic perovskite solar cells.

Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
AC36-08GO28308
OSTI ID:
1414065
Report Number(s):
NREL/JA-5900-70670
Journal Information:
Applied Surface Science, Vol. 477; ISSN 0169-4332
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (3)

Growth of Zinc Oxide Nanorods with the Thickness of Less than or Equal to 1  μ m through Zinc Acetate or Zinc Nitrate for Perovskite Solar Cell Applications journal November 2019
Metal Oxide Charge Transport Layers for Efficient and Stable Perovskite Solar Cells journal June 2019
Perovskite solar cell for greenhouse applications. other January 2020

Figures / Tables (7)