Photoelectrical properties of undoped and Na-doped Cu2ZnSnS4 single crystals measured by optical time-resolved spectroscopy

Le Quang Phuong, Makoto Okano, Yasuhiro Yamada, Akira Nagaoka, Kenji Yoshino, Yoshihiko Kanemitsu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We have studied photocarrier recombination and relaxation dynamics in Cu2ZnSnS4 (CZTS) single crystals using a combination of various optical time-resolved spectroscopy. The band tails and deep defects govern primarily the photocarrier dynamics in CZTS. We pointed out the physical origins behind low power conversion efficiencies of CZTS-based solar cells. In addition, we found that the photocarrier lifetime increases as Na is doped in CZTS; this result implies that Na doping suppresses a part of nonradiative recombination centers in CZTS. Therefore, Na dopant is important to improve the photovoltaic performance of CZTS-based solar cells.

Original languageEnglish
Title of host publication2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)9781479979448
DOIs
Publication statusPublished - 2015 Dec 14
Externally publishedYes
Event42nd IEEE Photovoltaic Specialist Conference, PVSC 2015 - New Orleans, United States
Duration: 2015 Jun 142015 Jun 19

Other

Other42nd IEEE Photovoltaic Specialist Conference, PVSC 2015
CountryUnited States
CityNew Orleans
Period15/6/1415/6/19

Fingerprint

Solar cells
Doping (additives)
Single crystals
Spectroscopy
Conversion efficiency
Defects
Cu2ZnSnS4

Keywords

  • Cu2ZnSnS4
  • photocarrier dynamics
  • sodium doping
  • solar cells
  • time-resolved spectroscopy

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

Cite this

Phuong, L. Q., Okano, M., Yamada, Y., Nagaoka, A., Yoshino, K., & Kanemitsu, Y. (2015). Photoelectrical properties of undoped and Na-doped Cu2ZnSnS4 single crystals measured by optical time-resolved spectroscopy. In 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015 [7356088] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PVSC.2015.7356088

Photoelectrical properties of undoped and Na-doped Cu2ZnSnS4 single crystals measured by optical time-resolved spectroscopy. / Phuong, Le Quang; Okano, Makoto; Yamada, Yasuhiro; Nagaoka, Akira; Yoshino, Kenji; Kanemitsu, Yoshihiko.

2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015. Institute of Electrical and Electronics Engineers Inc., 2015. 7356088.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Phuong, LQ, Okano, M, Yamada, Y, Nagaoka, A, Yoshino, K & Kanemitsu, Y 2015, Photoelectrical properties of undoped and Na-doped Cu2ZnSnS4 single crystals measured by optical time-resolved spectroscopy. in 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015., 7356088, Institute of Electrical and Electronics Engineers Inc., 42nd IEEE Photovoltaic Specialist Conference, PVSC 2015, New Orleans, United States, 15/6/14. https://doi.org/10.1109/PVSC.2015.7356088
Phuong LQ, Okano M, Yamada Y, Nagaoka A, Yoshino K, Kanemitsu Y. Photoelectrical properties of undoped and Na-doped Cu2ZnSnS4 single crystals measured by optical time-resolved spectroscopy. In 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015. Institute of Electrical and Electronics Engineers Inc. 2015. 7356088 https://doi.org/10.1109/PVSC.2015.7356088
Phuong, Le Quang ; Okano, Makoto ; Yamada, Yasuhiro ; Nagaoka, Akira ; Yoshino, Kenji ; Kanemitsu, Yoshihiko. / Photoelectrical properties of undoped and Na-doped Cu2ZnSnS4 single crystals measured by optical time-resolved spectroscopy. 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015. Institute of Electrical and Electronics Engineers Inc., 2015.
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