Title :
Pulsed laser processing of electrodeposited CuInSe2 Photovoltaic absorber thin films
Author :
Bhatia, A. ; Meadows, H. ; Oo, W. M Hlaing ; Dale, PJ ; Scarpulla, M.A.
Author_Institution :
Mater. Sci. & Eng., Univ. of Utah, Salt Lake City, UT, USA
Abstract :
In this report we investigate the effects of pulsed laser annealing (PLA) on both as-electrodeposited (ED) and electrodeposited-furnace annealed (EDA) CuInSe2 (CIS) samples by varying the laser fluence (J/cm2) and number of pulses. Results for as-ED samples indicate that liquid CIS-phase formation during PLA with 248 nm laser is to be avoided as liquid CIS dewets on Mo [1] as well as MoSe2. In the case of EDA-PLA samples, scanning electron microscopy (SEM) images suggest no apparent change in surface morphology but photoluminescence (PL) indicates change in PL yield and FWHM after PLA processing, a possible indication of annealing of defect states. The effects of PLA on defects are further explored using deep level transient spectroscopy (DLTS).
Keywords :
copper compounds; deep level transient spectroscopy; electrodeposition; indium compounds; laser beam annealing; photoluminescence; pulsed laser deposition; scanning electron microscopy; semiconductor thin films; solar absorber-convertors; solar cells; surface morphology; ternary semiconductors; CuInSe2; DLTS; EDA-PLA sample; FWHM processing; PLA processing; SEM; deep level transient spectroscopy; defect state annealing; electrodeposited photovoltaic absorber thin films; electrodeposited-furnace annealing; laser fluence; liquid CIS dewets; liquid CIS-phase formation; photoluminescence; pulsed laser annealing; pulsed laser processing; scanning electron microscopy image; surface morphology; Annealing; Optical surface waves; Programmable logic arrays; Surface emitting lasers; Surface morphology; Surface treatment; Transient analysis;
Conference_Titel :
Photovoltaic Specialists Conference (PVSC), 2011 37th IEEE
Conference_Location :
Seattle, WA
Print_ISBN :
978-1-4244-9966-3
DOI :
10.1109/PVSC.2011.6185931
