Properties of double electron transport layered perovskite solar cells with different ZrO2 layer thickness

Hyeryeong Lee, Kwangbae Kim, Ohsung Song

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

The photovoltaic properties of TiO2/ZrO2 double electron transport layered perovskite solar cells were investigated based on the ZrO2 layer thickness. Samples were fabricated with a glass/FTO/TiO2/ZrO2/ perovskite structure. The TiO2/ZrO2 layer thickness ratio was confirmed to be 264/0, 228/168, 228/204, 270/ 242, and 282/288 nm, respectively, using an electron probe microanalyzer. To analyze the photovoltaic characteristics and transmittance of the ZrO2 layer of the PSCs according to the ZrO2 layer thickness, a solar simulator, incident photon-to-current conversion efficiency, and ultraviolet-visible-near-infrared spectroscopy were used, respectively. A field emission scanning electron microscopy and atomic force microscopy were used to analyze the microstructure of the ZrO2 and perovskite layers. As the ZrO2 layer thickness increased, the energy conversion efficiency (ECE) increased initially, reached a maximum ECE of 14.24% at 204 nm ZrO2, and then decreased thereafter. The increase in ECE was due to the enhanced electrical conductivity of the ZrO2, while the decrease was attributed to the reduced transmittance as the thickness of the ZrO2 increased. In addition, we confirmed that the surface valley spacing in the ZrO2 layer might affect the grain size and thickness of the perovskite layers, influencing the ECE.

Original languageEnglish
Pages (from-to)59-66
Number of pages8
JournalJournal of Korean Institute of Metals and Materials
Volume58
Issue number1
DOIs
StatePublished - 2020

Keywords

  • Electron transport layer
  • Perovskite grain
  • Perovskite solar cells
  • ZrO layer

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