Local photocarrier dynamics in CdTe solar cells under optical and electron beam excitations

Heayoung P. Yoon; Paul M. Haney; Yohan Yoon; Sangmin An; James I. Basham; Nikolai B. Zhitenev

doi:10.1109/PVSC.2015.7356020

Local photocarrier dynamics in CdTe solar cells under optical and electron beam excitations

Heayoung P. Yoon
, Paul M. Haney
, Yohan Yoon
, Sangmin An
, James I. Basham
, Nikolai B. Zhitenev

Department of Physics

National Institute of Standards and Technology
University of Maryland, College Park

Research output: Contribution to conference › Conference paper › peer-review

1 Scopus citations

Abstract

We compare local carrier dynamics in n-CdS / p-CdTe solar cells, where the electron-hole pairs are generated by either near-field optical illumination or highly focused electron beam excitation. An ion beam milling process was used to prepare a smooth surface of cross-sectional devices. The spatially resolved photocurrent images confirm high carrier collection efficiency at grain boundaries. An analytical model was used to extract material parameters at the level of single grains. We find that the minority carrier diffusion lengths extracted from both local measurements are in excellent agreement, but are smaller than the values determined from macro-scale measurements.

Original language	English
Title of host publication	2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781479979448
DOIs	https://doi.org/10.1109/PVSC.2015.7356020
State	Published - 2015.12.14
Event	42nd IEEE Photovoltaic Specialist Conference, PVSC 2015 - New Orleans, United States Duration: 2015.06.14 → 2015.06.19

Publication series

Name	2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015

Conference

Conference	42nd IEEE Photovoltaic Specialist Conference, PVSC 2015
Country/Territory	United States
City	New Orleans
Period	15.06.14 → 15.06.19

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

cadmium telluride
electron beam induced current
grain boundary
near-field optical microscopy
solar cell

Access to Document

10.1109/PVSC.2015.7356020

Cite this

Yoon, H. P., Haney, P. M., Yoon, Y., An, S., Basham, J. I., & Zhitenev, N. B. (2015). Local photocarrier dynamics in CdTe solar cells under optical and electron beam excitations. In 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015 Article 7356020 (2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PVSC.2015.7356020

@inproceedings{9a3cda79ca0046b8bd39ece4f198ff99,

title = "Local photocarrier dynamics in CdTe solar cells under optical and electron beam excitations",

abstract = "We compare local carrier dynamics in n-CdS / p-CdTe solar cells, where the electron-hole pairs are generated by either near-field optical illumination or highly focused electron beam excitation. An ion beam milling process was used to prepare a smooth surface of cross-sectional devices. The spatially resolved photocurrent images confirm high carrier collection efficiency at grain boundaries. An analytical model was used to extract material parameters at the level of single grains. We find that the minority carrier diffusion lengths extracted from both local measurements are in excellent agreement, but are smaller than the values determined from macro-scale measurements.",

keywords = "cadmium telluride, electron beam induced current, grain boundary, near-field optical microscopy, solar cell",

author = "Yoon, \{Heayoung P.\} and Haney, \{Paul M.\} and Yohan Yoon and Sangmin An and Basham, \{James I.\} and Zhitenev, \{Nikolai B.\}",

note = "Publisher Copyright: {\textcopyright} 2015 IEEE.; 42nd IEEE Photovoltaic Specialist Conference, PVSC 2015 ; Conference date: 14-06-2015 Through 19-06-2015",

year = "2015",

month = dec,

day = "14",

doi = "10.1109/PVSC.2015.7356020",

language = "English",

series = "2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

booktitle = "2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015",

}

Yoon, HP, Haney, PM, Yoon, Y, An, S, Basham, JI & Zhitenev, NB 2015, Local photocarrier dynamics in CdTe solar cells under optical and electron beam excitations. in 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015., 7356020, 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015, Institute of Electrical and Electronics Engineers Inc., 42nd IEEE Photovoltaic Specialist Conference, PVSC 2015, New Orleans, United States, 15.06.14. https://doi.org/10.1109/PVSC.2015.7356020

Local photocarrier dynamics in CdTe solar cells under optical and electron beam excitations. / Yoon, Heayoung P.; Haney, Paul M.; Yoon, Yohan et al.
2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015. Institute of Electrical and Electronics Engineers Inc., 2015. 7356020 (2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015).

Research output: Contribution to conference › Conference paper › peer-review

TY - GEN

T1 - Local photocarrier dynamics in CdTe solar cells under optical and electron beam excitations

AU - Yoon, Heayoung P.

AU - Haney, Paul M.

AU - Yoon, Yohan

AU - An, Sangmin

AU - Basham, James I.

AU - Zhitenev, Nikolai B.

PY - 2015/12/14

Y1 - 2015/12/14

N2 - We compare local carrier dynamics in n-CdS / p-CdTe solar cells, where the electron-hole pairs are generated by either near-field optical illumination or highly focused electron beam excitation. An ion beam milling process was used to prepare a smooth surface of cross-sectional devices. The spatially resolved photocurrent images confirm high carrier collection efficiency at grain boundaries. An analytical model was used to extract material parameters at the level of single grains. We find that the minority carrier diffusion lengths extracted from both local measurements are in excellent agreement, but are smaller than the values determined from macro-scale measurements.

AB - We compare local carrier dynamics in n-CdS / p-CdTe solar cells, where the electron-hole pairs are generated by either near-field optical illumination or highly focused electron beam excitation. An ion beam milling process was used to prepare a smooth surface of cross-sectional devices. The spatially resolved photocurrent images confirm high carrier collection efficiency at grain boundaries. An analytical model was used to extract material parameters at the level of single grains. We find that the minority carrier diffusion lengths extracted from both local measurements are in excellent agreement, but are smaller than the values determined from macro-scale measurements.

KW - cadmium telluride

KW - electron beam induced current

KW - grain boundary

KW - near-field optical microscopy

KW - solar cell

UR - https://www.scopus.com/pages/publications/84961653885

U2 - 10.1109/PVSC.2015.7356020

DO - 10.1109/PVSC.2015.7356020

M3 - Conference paper

AN - SCOPUS:84961653885

T3 - 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015

BT - 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 42nd IEEE Photovoltaic Specialist Conference, PVSC 2015

Y2 - 14 June 2015 through 19 June 2015

ER -

Yoon HP, Haney PM, Yoon Y, An S, Basham JI, Zhitenev NB. Local photocarrier dynamics in CdTe solar cells under optical and electron beam excitations. In 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015. Institute of Electrical and Electronics Engineers Inc. 2015. 7356020. (2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015). doi: 10.1109/PVSC.2015.7356020

Local photocarrier dynamics in CdTe solar cells under optical and electron beam excitations

Abstract

Publication series

Conference

UN SDGs

Keywords

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