Electroreflectance study of CuIn1-xGaxSe2 thin film solar cells

Hyun Jun Jo; Dong Hwan Jeon; Byoung Soo Ko; Shi Joon Sung; Dae Kue Hwang; Jin Kyu Kang; Dae Hwan Kim

doi:10.1016/j.cap.2013.12.016

Electroreflectance study of CuIn_1-xGa_xSe₂ thin film solar cells

Hyun Jun Jo, Dong Hwan Jeon, Byoung Soo Ko, Shi Joon Sung, Dae Kue Hwang, Jin Kyu Kang, Dae Hwan Kim

Division of Energy Techonology

Daegu Gyeongbuk Institute of Science and Technology

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

We have investigated the optical properties of CuIn_1-xGa _xSe₂ (CIGS) thin film solar cells using their electroreflectance (ER) at room temperature. The ER spectra exhibited one broad and two narrow signal regions. Using the photoluminescence (PL) and photocurrent (PC) spectra, the peaks in the low-energy region (1.02-1.35 eV) can be assigned to the CIGS thin film. The PC results implied that the peaks in the high-energy region (2.10-2.52 eV) can be assigned to the CdS band-gap energy. Using the applied bias voltage, the broad signals in the 1.35-2.09 eV region can be assigned to the Franz-Keldysh oscillation (FKO) due to the internal electric field. The ER spectra exhibited a distorted CdS signal for the CIGS thin film solar cell with low shunt resistance and efficiency.

Original language	English
Pages (from-to)	318-321
Number of pages	4
Journal	Current Applied Physics
Volume	14
Issue number	3
DOIs	https://doi.org/10.1016/j.cap.2013.12.016
State	Published - Mar 2014

Bibliographical note

Funding Information:
This work was supported by the New & Renewable Energy of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Trade, Industry and Energy (No. 20123010010130 ).

Keywords

CIGS
CdS
Electroreflectance

Access to Document

10.1016/j.cap.2013.12.016

Cite this

@article{0231943a060045c6b81ad8b6d16aa32b,

title = "Electroreflectance study of CuIn1-xGaxSe2 thin film solar cells",

abstract = "We have investigated the optical properties of CuIn1-xGa xSe2 (CIGS) thin film solar cells using their electroreflectance (ER) at room temperature. The ER spectra exhibited one broad and two narrow signal regions. Using the photoluminescence (PL) and photocurrent (PC) spectra, the peaks in the low-energy region (1.02-1.35 eV) can be assigned to the CIGS thin film. The PC results implied that the peaks in the high-energy region (2.10-2.52 eV) can be assigned to the CdS band-gap energy. Using the applied bias voltage, the broad signals in the 1.35-2.09 eV region can be assigned to the Franz-Keldysh oscillation (FKO) due to the internal electric field. The ER spectra exhibited a distorted CdS signal for the CIGS thin film solar cell with low shunt resistance and efficiency.",

keywords = "CIGS, CdS, Electroreflectance",

author = "Jo, {Hyun Jun} and Jeon, {Dong Hwan} and Ko, {Byoung Soo} and Sung, {Shi Joon} and Hwang, {Dae Kue} and Kang, {Jin Kyu} and Kim, {Dae Hwan}",

note = "Funding Information: This work was supported by the New & Renewable Energy of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Trade, Industry and Energy (No. 20123010010130 ). ",

year = "2014",

month = mar,

doi = "10.1016/j.cap.2013.12.016",

language = "English",

volume = "14",

pages = "318--321",

journal = "Current Applied Physics",

issn = "1567-1739",

publisher = "Elsevier B.V.",

number = "3",

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TY - JOUR

T1 - Electroreflectance study of CuIn1-xGaxSe2 thin film solar cells

AU - Jo, Hyun Jun

AU - Jeon, Dong Hwan

AU - Ko, Byoung Soo

AU - Sung, Shi Joon

AU - Hwang, Dae Kue

AU - Kang, Jin Kyu

AU - Kim, Dae Hwan

N1 - Funding Information: This work was supported by the New & Renewable Energy of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Trade, Industry and Energy (No. 20123010010130 ).

PY - 2014/3

Y1 - 2014/3

N2 - We have investigated the optical properties of CuIn1-xGa xSe2 (CIGS) thin film solar cells using their electroreflectance (ER) at room temperature. The ER spectra exhibited one broad and two narrow signal regions. Using the photoluminescence (PL) and photocurrent (PC) spectra, the peaks in the low-energy region (1.02-1.35 eV) can be assigned to the CIGS thin film. The PC results implied that the peaks in the high-energy region (2.10-2.52 eV) can be assigned to the CdS band-gap energy. Using the applied bias voltage, the broad signals in the 1.35-2.09 eV region can be assigned to the Franz-Keldysh oscillation (FKO) due to the internal electric field. The ER spectra exhibited a distorted CdS signal for the CIGS thin film solar cell with low shunt resistance and efficiency.

AB - We have investigated the optical properties of CuIn1-xGa xSe2 (CIGS) thin film solar cells using their electroreflectance (ER) at room temperature. The ER spectra exhibited one broad and two narrow signal regions. Using the photoluminescence (PL) and photocurrent (PC) spectra, the peaks in the low-energy region (1.02-1.35 eV) can be assigned to the CIGS thin film. The PC results implied that the peaks in the high-energy region (2.10-2.52 eV) can be assigned to the CdS band-gap energy. Using the applied bias voltage, the broad signals in the 1.35-2.09 eV region can be assigned to the Franz-Keldysh oscillation (FKO) due to the internal electric field. The ER spectra exhibited a distorted CdS signal for the CIGS thin film solar cell with low shunt resistance and efficiency.

KW - CIGS

KW - CdS

KW - Electroreflectance

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