Inkjet printed CuIn(1-X)GaXSe2 thin film by controlled selenium distribution for improved power conversion efficiency in chalcopyrite solar cells

Yadav, Brijesh Singh and Dey, Suhash Ranjan and Dhage, Sanjay R. (2021) Inkjet printed CuIn(1-X)GaXSe2 thin film by controlled selenium distribution for improved power conversion efficiency in chalcopyrite solar cells. Applied Surface Science Advances, 6. pp. 1-7. ISSN 2666-5239

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Abstract

Selenium (Se) vapor pressure is a key factor during the selenization of CuIn1-XGaX (CIG) film to obtain a high-quality CuIn1-XGaXSe2 (CIGS) absorber layer. To investigate the effect of Se vapor distribution on the grain growth of inkjet printed precursor film, two geometries of graphite box (square and circular) are used. The results revealed that selenization in the round graphite box give rise to uniform surface coverage and suppressed fine-grained layer due to adequate and uniform distribution of Se vapor. In contrast, film selenized in a square graphite box exhibits high strain and low crystallinity with a thick fine-grained layer. Probable Se vapor distribution inside the graphite box based on internal geometrical constraint and its impact on crystal phase and microstructure is discussed. Finally, CIGS devices fabricated using films selenized in a round graphite box demonstrates higher power-conversion efficiency of 5.2%, owing to high light absorption and efficient carrier separation. Based on J-V and EQE results, probable losses and recombination in the devices are examined and discussed. © 2021 The Author(s)

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IITH Creators:

IITH Creators	ORCiD
Dey, Suhash Ranjan	http://orcid.org/0000-0002-5148-9534

Item Type:

Article

Additional Information:

This work is supported by ARCI-Technology Research Center (TRC) {Ref. No. Al/1/65/ARCI/2014(c) } through Department of Science and Technology (DST), India. The authors are thankful to Director ARCI for permitting us to publish this work. We thank Dr K. Suresh (CMCT, ARCI) and Dr Sreekanth Mandati (CSEM, ARCI) to support the characterization of CIGS thin films. We also would like to thank Ms Ramya Krishna Battula (CSEM, ARCI) for performing the EQE measurements of CIGS solar cells.

Uncontrolled Keywords:

CIGS; Fine-grained layer; Graphite box geometry; Inkjet printing; Se vapor

Subjects:

Materials Engineering > Materials engineering

Divisions:

Department of Material Science Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

01 Sep 2022 04:06

Last Modified:

01 Sep 2022 04:06