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Title: Low temperature perovskite solar cells with an evaporated TiO 2 compact layer for perovskite silicon tandem solar cells

Abstract

Silicon-based tandem solar cells can overcome the efficiency limit of single junction silicon solar cells. Perovskite solar cells are particularly promising as a top cell in monolithic tandem devices due to their rapid development towards high efficiencies, a tunable band gap with a sharp optical absorption edge and a simple production process. In monolithic tandem devices, the perovskite solar cell is deposited directly on the silicon cell, requiring low-temperature processes (< 200 °C) to maintain functionality of under-lying layers of the silicon cell in case of highly efficient silicon hetero-junction (SHJ) bottom solar cell. In this work, we present a complete low-temperature process for perovskite solar cells including a mesoporous titanium oxide (TiO 2) scaffold - a structure yielding the highest efficiencies for single-junction perovskite solar cells. We show that evaporation of the compact TiO 2 hole blocking layer and ultra-violet (UV) curing for the mesoporous TiO 2 layer allows for good performance, comparable to high-temperature (> 500 °C) processes. With both manufacturing routes, we obtain short-circuit current densities (J SC) of about 20 mA/cm 2, open-circuit voltages (V OC) over 1 V, fill factors (FF) between 0.7 and 0.8 and efficiencies (n) of more than 15%. We further showmore » that the evaporated TiO 2 layer is suitable for the application in tandem devices. The series resistance of the layer itself and the contact resistance to an indium doped tin oxide (ITO) interconnection layer between the two sub-cells are low. Additionally, the low parasitic absorption for wavelengths above the perovskite band gap allow a higher absorption in the silicon bottom solar cell, which is essential to achieve high tandem efficiencies.« less

Authors:
 [1];  [1];  [1];  [1];  [2];  [1];  [1];  [3];  [4];  [1];  [1];  [1];  [1];  [1];  [3];  [5];  [3];  [1];  [3];  [1] more »;  [1] « less
  1. Fraunhofer Institute for Solar Energy Systems, Freiburg (Germany)
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States)
  3. Fraunhofer Institute for Solar Energy Systems, Freiburg (Germany); Univ. of Freiburg, Freiburg (Germany)
  4. Korea Univ., Seoul (Korea)
  5. Univ. of Freiburg, Freiburg (Germany)
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
German Federal Ministry for Economic Affairs and Energy; USDOE
OSTI Identifier:
1409002
Report Number(s):
NREL/JA-5J00-70501
Journal ID: ISSN 1876-6102
Grant/Contract Number:
AC36-08GO28308
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Energy Procedia
Additional Journal Information:
Journal Volume: 124; Journal Issue: C; Journal ID: ISSN 1876-6102
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 36 MATERIALS SCIENCE; perovskite solar cells; low-temperature process; TiO2/ITO resistance

Citation Formats

Bett, Alexander J., Schulze, Patricia S. C., Winkler, Kristina, Gasparetto, Jacopo, Ndione, Paul F., Bivour, Martin, Hinsch, Andreas, Kohlstädt, Markus, Lee, Seunghun, Mastroianni, Simone, Mundt, Laura E., Mundus, Markus, Reichel, Christian, Richter, Armin, Veit, Clemens, Wienands, Karl, Würfel, Uli, Veurman, Welmoed, Glunz, Stefan W., Hermle, Martin, and Goldschmidt, Jan Christoph. Low temperature perovskite solar cells with an evaporated TiO2 compact layer for perovskite silicon tandem solar cells. United States: N. p., 2017. Web. doi:10.1016/j.egypro.2017.09.293.
Bett, Alexander J., Schulze, Patricia S. C., Winkler, Kristina, Gasparetto, Jacopo, Ndione, Paul F., Bivour, Martin, Hinsch, Andreas, Kohlstädt, Markus, Lee, Seunghun, Mastroianni, Simone, Mundt, Laura E., Mundus, Markus, Reichel, Christian, Richter, Armin, Veit, Clemens, Wienands, Karl, Würfel, Uli, Veurman, Welmoed, Glunz, Stefan W., Hermle, Martin, & Goldschmidt, Jan Christoph. Low temperature perovskite solar cells with an evaporated TiO2 compact layer for perovskite silicon tandem solar cells. United States. doi:10.1016/j.egypro.2017.09.293.
Bett, Alexander J., Schulze, Patricia S. C., Winkler, Kristina, Gasparetto, Jacopo, Ndione, Paul F., Bivour, Martin, Hinsch, Andreas, Kohlstädt, Markus, Lee, Seunghun, Mastroianni, Simone, Mundt, Laura E., Mundus, Markus, Reichel, Christian, Richter, Armin, Veit, Clemens, Wienands, Karl, Würfel, Uli, Veurman, Welmoed, Glunz, Stefan W., Hermle, Martin, and Goldschmidt, Jan Christoph. Thu . "Low temperature perovskite solar cells with an evaporated TiO2 compact layer for perovskite silicon tandem solar cells". United States. doi:10.1016/j.egypro.2017.09.293. https://www.osti.gov/servlets/purl/1409002.
@article{osti_1409002,
title = {Low temperature perovskite solar cells with an evaporated TiO2 compact layer for perovskite silicon tandem solar cells},
author = {Bett, Alexander J. and Schulze, Patricia S. C. and Winkler, Kristina and Gasparetto, Jacopo and Ndione, Paul F. and Bivour, Martin and Hinsch, Andreas and Kohlstädt, Markus and Lee, Seunghun and Mastroianni, Simone and Mundt, Laura E. and Mundus, Markus and Reichel, Christian and Richter, Armin and Veit, Clemens and Wienands, Karl and Würfel, Uli and Veurman, Welmoed and Glunz, Stefan W. and Hermle, Martin and Goldschmidt, Jan Christoph},
abstractNote = {Silicon-based tandem solar cells can overcome the efficiency limit of single junction silicon solar cells. Perovskite solar cells are particularly promising as a top cell in monolithic tandem devices due to their rapid development towards high efficiencies, a tunable band gap with a sharp optical absorption edge and a simple production process. In monolithic tandem devices, the perovskite solar cell is deposited directly on the silicon cell, requiring low-temperature processes (< 200 °C) to maintain functionality of under-lying layers of the silicon cell in case of highly efficient silicon hetero-junction (SHJ) bottom solar cell. In this work, we present a complete low-temperature process for perovskite solar cells including a mesoporous titanium oxide (TiO2) scaffold - a structure yielding the highest efficiencies for single-junction perovskite solar cells. We show that evaporation of the compact TiO2 hole blocking layer and ultra-violet (UV) curing for the mesoporous TiO2 layer allows for good performance, comparable to high-temperature (> 500 °C) processes. With both manufacturing routes, we obtain short-circuit current densities (JSC) of about 20 mA/cm2, open-circuit voltages (VOC) over 1 V, fill factors (FF) between 0.7 and 0.8 and efficiencies (n) of more than 15%. We further show that the evaporated TiO2 layer is suitable for the application in tandem devices. The series resistance of the layer itself and the contact resistance to an indium doped tin oxide (ITO) interconnection layer between the two sub-cells are low. Additionally, the low parasitic absorption for wavelengths above the perovskite band gap allow a higher absorption in the silicon bottom solar cell, which is essential to achieve high tandem efficiencies.},
doi = {10.1016/j.egypro.2017.09.293},
journal = {Energy Procedia},
number = C,
volume = 124,
place = {United States},
year = {Thu Sep 21 00:00:00 EDT 2017},
month = {Thu Sep 21 00:00:00 EDT 2017}
}

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