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

Abstract

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.

Authors:
 [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)
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1414065
Report Number(s):
NREL/JA-5900-70670
Journal ID: ISSN 0169-4332
Grant/Contract Number:  
AC36-08GO28308
Resource Type:
Accepted Manuscript
Journal Name:
Applied Surface Science
Additional Journal Information:
Journal Volume: 477; Journal ID: ISSN 0169-4332
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 36 MATERIALS SCIENCE; perovskite solar cell; mesoporous TiO2; charge injection; charge transport; internal resistance

Citation Formats

Lee, Dong Geon, Kim, Min-cheol, Kim, Byeong Jo, Kim, Dong Hoe, Lee, Sang Myeong, Choi, Mansoo, Lee, Sangwook, and Jung, Hyun Suk. Effect of TiO2 particle size and layer thickness on mesoscopic perovskite solar cells. United States: N. p., 2017. Web. doi:10.1016/j.apsusc.2017.11.124.
Lee, Dong Geon, Kim, Min-cheol, Kim, Byeong Jo, Kim, Dong Hoe, Lee, Sang Myeong, Choi, Mansoo, Lee, Sangwook, & Jung, Hyun Suk. Effect of TiO2 particle size and layer thickness on mesoscopic perovskite solar cells. United States. doi:10.1016/j.apsusc.2017.11.124.
Lee, Dong Geon, Kim, Min-cheol, Kim, Byeong Jo, Kim, Dong Hoe, Lee, Sang Myeong, Choi, Mansoo, Lee, Sangwook, and Jung, Hyun Suk. Thu . "Effect of TiO2 particle size and layer thickness on mesoscopic perovskite solar cells". United States. doi:10.1016/j.apsusc.2017.11.124. https://www.osti.gov/servlets/purl/1414065.
@article{osti_1414065,
title = {Effect of TiO2 particle size and layer thickness on mesoscopic perovskite solar cells},
author = {Lee, Dong Geon and Kim, Min-cheol and Kim, Byeong Jo and Kim, Dong Hoe and Lee, Sang Myeong and Choi, Mansoo and Lee, Sangwook and Jung, Hyun Suk},
abstractNote = {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.},
doi = {10.1016/j.apsusc.2017.11.124},
journal = {Applied Surface Science},
number = ,
volume = 477,
place = {United States},
year = {2017},
month = {11}
}

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Figures / Tables:

Fig. 1 Fig. 1: (a) TEM images of the T25 (left panel) and T41 (right panel) TiO2 NPs; scale bars: 40 nm. (b) XRD patterns of T25 and T41. (c) XPS spectra of the mesoporous (mp)-TiO2 films made with T25 and T41. (d) N2 sorption isotherms of the mp-TiO2 films made withmore » T25 and T41; the important sorption isotherm parameters are summarized in Table 1.« less

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.