Title :
Large area deposition of widegap copper indium selenide absorbers
Author :
Menezes, Shalini ; Yan Li
Author_Institution :
InterPhases Solar, Inc., Moorpark, CA, USA
Abstract :
Electrochemical growth of copper-indium-selenide (CIS) compounds is investigated, aimed at providing a non-vacuum large-area deposition method. CIS film formation is identified with cyclic voltammetry. Its growth, monitored with XRF, shows excellent composition and thickness uniformity. The results agree with SIMS profiles and XRD data, indicating conversion of initially formed binary phases to homogenous ternary compounds. They demonstrate that one can avail of thermodynamic reaction control to produce surprisingly stoichiometric CIS compositions over a wide range of process parameters. This outcome enables extending the benefits of industrial scale roll-to-roll electrodeposition to obtain widegap CIS PV absorbers on flexible foil.
Keywords :
X-ray diffraction; X-ray emission spectra; X-ray fluorescence analysis; copper compounds; electrochemistry; electrodeposition; energy gap; fluorescence; indium compounds; secondary ion mass spectra; semiconductor growth; semiconductor thin films; stoichiometry; ternary semiconductors; thermodynamics; voltammetry (chemical analysis); CIS film; CuIn3Se5; SIMS profile; X-ray diffraction; X-ray fluorescence; XRD; XRF; band gap; binary phase; composition uniformity; cyclic voltammetry; electrochemical growth; flexible foil; homogenous ternary compounds; industrial scale roll-to-roll electrodeposition; nonvacuum large-area deposition; secondary ion mass spectra; stoichiometric CIS composition; thermodynamic reaction; thickness uniformity; widegap copper indium selenide absorbers; Atomic layer deposition; Compounds; Electric potential; Films; Metals; Photovoltaic cells; Substrates; CuIn3Se5; composition profiles; electrodeposition; ordered defect chalcopyrite; reaction mechanism; thin film solar cell;
Conference_Titel :
Photovoltaic Specialists Conference (PVSC), 2013 IEEE 39th
Conference_Location :
Tampa, FL
DOI :
10.1109/PVSC.2013.6745010
