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Title: Point Defects, Compositional Fluctuations and Secondary Phases in Non-Stoichiometric Kesterites

Abstract

The efficiency of kesterite-based solar cells is limited by various non-ideal recombination paths, amongst other by a high density of defect states and by the presence of binary or ternary secondary phases within the absorber layer. Pronounced compositional variations and secondary phase segregations are indeed typical features of non-stoichiometric kesterite materials. Certainly kesterite-based thin film solar cells with an off-stoichiometric absorber layer composition, especially Cu-poor/Zn-rich, achieved the highest efficiencies, but deviations from the stoichiometric composition lead to the formation of intrinsic point defects (vacancies, anti-sites, and interstitials) in the kesterite-type material. In addition, a non-stoichiometric composition is usually associated with the formation of undesirable side-phase (secondary phases). Thus the correlation between off-stoichiometry and intrinsic point defects as well as the identification and quantification of secondary phases and compositional fluctuations in non-stoichiometric kesterite materials is of great importance for the understanding and rational design of solar cell devices. This paper summarizes the latest achievements in the investigation of identification and quantification of intrinsic point defects, compositional fluctuations and secondary phases in non-stoichiometric kesterite-type materials.

Authors:
 [1];  [2];  [3]; ORCiD logo [4];  [5];  [6];  [7];  [8];  [8];  [9]
  1. Helmholtz-Zentrum Berlin fuer Materialien und Energie; Freie Universitat Berlin
  2. Helmholtz-Zentrum Berlin fuer Materialien und Energie
  3. Catalonia Institute for Energy Research (IREC); Institute of Applied Physics, Moldova
  4. National Renewable Energy Laboratory (NREL), Golden, CO (United States)
  5. Catalonia Institute for Energy Research (IREC); Universitat de Barcelona
  6. Catalonia Institute for Energy Research (IREC)
  7. Universitaet Leipzig
  8. Ewha Womens University
  9. Universidad Autonoma de Madrid
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Fuel Cell Technologies Office (EE-3F)
OSTI Identifier:
1571901
Report Number(s):
NREL/JA-5900-75240
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Journal Article
Journal Name:
JPhys Energy
Additional Journal Information:
Journal Name: JPhys Energy
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 36 MATERIALS SCIENCE; kesterites; solar cells; defect states; point defects

Citation Formats

Schorr, Susan, Gurieva, Galina, Guc, Maxim, Dimitrievska, Mirjana, Perez-Rodriguez, Alejandro, Izquierdo-Roca, Victor, Schnohr, Claudia S., Kim, Juran, Jo, William, and Merino, Jose Manuel. Point Defects, Compositional Fluctuations and Secondary Phases in Non-Stoichiometric Kesterites. United States: N. p., 2019. Web. doi:10.1088/2515-7655/ab4a25.
Schorr, Susan, Gurieva, Galina, Guc, Maxim, Dimitrievska, Mirjana, Perez-Rodriguez, Alejandro, Izquierdo-Roca, Victor, Schnohr, Claudia S., Kim, Juran, Jo, William, & Merino, Jose Manuel. Point Defects, Compositional Fluctuations and Secondary Phases in Non-Stoichiometric Kesterites. United States. doi:10.1088/2515-7655/ab4a25.
Schorr, Susan, Gurieva, Galina, Guc, Maxim, Dimitrievska, Mirjana, Perez-Rodriguez, Alejandro, Izquierdo-Roca, Victor, Schnohr, Claudia S., Kim, Juran, Jo, William, and Merino, Jose Manuel. Wed . "Point Defects, Compositional Fluctuations and Secondary Phases in Non-Stoichiometric Kesterites". United States. doi:10.1088/2515-7655/ab4a25.
@article{osti_1571901,
title = {Point Defects, Compositional Fluctuations and Secondary Phases in Non-Stoichiometric Kesterites},
author = {Schorr, Susan and Gurieva, Galina and Guc, Maxim and Dimitrievska, Mirjana and Perez-Rodriguez, Alejandro and Izquierdo-Roca, Victor and Schnohr, Claudia S. and Kim, Juran and Jo, William and Merino, Jose Manuel},
abstractNote = {The efficiency of kesterite-based solar cells is limited by various non-ideal recombination paths, amongst other by a high density of defect states and by the presence of binary or ternary secondary phases within the absorber layer. Pronounced compositional variations and secondary phase segregations are indeed typical features of non-stoichiometric kesterite materials. Certainly kesterite-based thin film solar cells with an off-stoichiometric absorber layer composition, especially Cu-poor/Zn-rich, achieved the highest efficiencies, but deviations from the stoichiometric composition lead to the formation of intrinsic point defects (vacancies, anti-sites, and interstitials) in the kesterite-type material. In addition, a non-stoichiometric composition is usually associated with the formation of undesirable side-phase (secondary phases). Thus the correlation between off-stoichiometry and intrinsic point defects as well as the identification and quantification of secondary phases and compositional fluctuations in non-stoichiometric kesterite materials is of great importance for the understanding and rational design of solar cell devices. This paper summarizes the latest achievements in the investigation of identification and quantification of intrinsic point defects, compositional fluctuations and secondary phases in non-stoichiometric kesterite-type materials.},
doi = {10.1088/2515-7655/ab4a25},
journal = {JPhys Energy},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {10}
}