Near infrared laser CdCl2 heat treatment for CDTE solar cells

The CdCl2 heat treatment (HT) is one of the most critical steps in the fabrication of high efficiency CdTe solar cells. In this study a laser based CdCl2 treatment is presented. A high power near infrared 808 nm) diode laser was used for laser annealing (LA) CdTe cells. The effect of laser power den...

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Main Authors:	Vasilios Palekis, Shamara Collins, Md Imran Khan, Vamsi Evani, Sudhajit Misra, Michael A. Scarpulla, Ali Abbas, Michael Walls, Chris Ferekides
Format:	Default Conference proceeding
Published:	2016
Subjects:	Mechanical engineering not elsewhere classified untagged Mechanical Engineering not elsewhere classified
Online Access:	https://hdl.handle.net/2134/23056
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id	rr-article-9546734
record_format	Figshare
spelling	rr-article-95467342016-01-01T00:00:00Z Near infrared laser CdCl2 heat treatment for CDTE solar cells Vasilios Palekis (3356732) Shamara Collins (7205915) Md Imran Khan (7205918) Vamsi Evani (7205921) Sudhajit Misra (7205924) Michael A. Scarpulla (2603533) Ali Abbas (1253115) Michael Walls (1251705) Chris Ferekides (7205927) Mechanical engineering not elsewhere classified untagged Mechanical Engineering not elsewhere classified The CdCl2 heat treatment (HT) is one of the most critical steps in the fabrication of high efficiency CdTe solar cells. In this study a laser based CdCl2 treatment is presented. A high power near infrared 808 nm) diode laser was used for laser annealing (LA) CdTe cells. The effect of laser power density (LPD)and annealing time on the devices was studied using photoluminescence PL), current voltage and spectral response measurements. PL spectra exhibited a correlation between the LPD and the defect density in CdTe. CdS thinning and narrowing of the CdTe bandgap was observed with increasing LPD and longer anneal times. All solar cell parameters, open-circuit voltage (VOC), short-circuit current (JSC), and fill-factor (FF), improved as a result of the laser annealing compared to as-deposited cells. The LPD was optimized with best cell parameters obtained to-date being: VOC=800mV, JSC= 23.34 mA/cm2, and FF=71%. 2016-01-01T00:00:00Z Text Conference contribution 2134/23056 https://figshare.com/articles/conference_contribution/Near_infrared_laser_CdCl2_heat_treatment_for_CDTE_solar_cells/9546734 CC BY-NC-ND 4.0
institution	Loughborough University
collection	Figshare
topic	Mechanical engineering not elsewhere classified untagged Mechanical Engineering not elsewhere classified
spellingShingle	Mechanical engineering not elsewhere classified untagged Mechanical Engineering not elsewhere classified Vasilios Palekis Shamara Collins Md Imran Khan Vamsi Evani Sudhajit Misra Michael A. Scarpulla Ali Abbas Michael Walls Chris Ferekides Near infrared laser CdCl2 heat treatment for CDTE solar cells
description	The CdCl2 heat treatment (HT) is one of the most critical steps in the fabrication of high efficiency CdTe solar cells. In this study a laser based CdCl2 treatment is presented. A high power near infrared 808 nm) diode laser was used for laser annealing (LA) CdTe cells. The effect of laser power density (LPD)and annealing time on the devices was studied using photoluminescence PL), current voltage and spectral response measurements. PL spectra exhibited a correlation between the LPD and the defect density in CdTe. CdS thinning and narrowing of the CdTe bandgap was observed with increasing LPD and longer anneal times. All solar cell parameters, open-circuit voltage (VOC), short-circuit current (JSC), and fill-factor (FF), improved as a result of the laser annealing compared to as-deposited cells. The LPD was optimized with best cell parameters obtained to-date being: VOC=800mV, JSC= 23.34 mA/cm2, and FF=71%.
format	Default Conference proceeding
author	Vasilios Palekis Shamara Collins Md Imran Khan Vamsi Evani Sudhajit Misra Michael A. Scarpulla Ali Abbas Michael Walls Chris Ferekides
author_facet	Vasilios Palekis Shamara Collins Md Imran Khan Vamsi Evani Sudhajit Misra Michael A. Scarpulla Ali Abbas Michael Walls Chris Ferekides
author_sort	Vasilios Palekis (3356732)
title	Near infrared laser CdCl2 heat treatment for CDTE solar cells
title_short	Near infrared laser CdCl2 heat treatment for CDTE solar cells
title_full	Near infrared laser CdCl2 heat treatment for CDTE solar cells
title_fullStr	Near infrared laser CdCl2 heat treatment for CDTE solar cells
title_full_unstemmed	Near infrared laser CdCl2 heat treatment for CDTE solar cells
title_sort	near infrared laser cdcl2 heat treatment for cdte solar cells
publishDate	2016
url	https://hdl.handle.net/2134/23056
_version_	1797465583548104704

Near infrared laser CdCl2 heat treatment for CDTE solar cells

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