Use of diethylselenide as a less-hazardous source for preparation of CuInSe2 thin films by selenization of metal precursors

Use of diethylselenide for the preparation of CuInGaSe 2 films by selenization of metal precursors premixed with Se

“…The precursors were selenized using DESe for 90 min at atmospheric pressure. The details of the selenization equipment have been described in our previous report [13]. The selenization temperature and N 2 carrier gas flow rate were 515°C and 2 L/min, respectively.…”

“…As an alternative to these Se precursors, the authors have proposed the use of diethylselenide [(C 2 H 5 ) 2 Se: DESe] as a Se source for the selenization growth, and obtained densely-packed, singlephase, adhesive polycrystalline CIS films [12,13]. Since DESe is a metalorganic liquid at room temperature and is stored in atmospheric-pressure stainless-steel cylinders, the danger of widespread leakage is less likely compared with H 2 Se.…”

CIGSS Thin Film Solar Cells: Final Subcontract Report, 10 October 2001-30 June 2005

“…As of now, CIGSS/CdS thin film solar cells are being prepared by rapid thermal processing and conventional selenization using diethylselenide (DESe) as selenium source [6,7] and H S as sulfur source [8], in combination with DC/RF magnetron sputtering and chemical bath deposition technique. Sulfurization of metallic precursors is a well-developed process to produce a high bandgap (1.55eV) absorber.…”

Preparation of Cu(In,Al)Se2 thin films by selenization using diethylselenide

“…The authors have proposed the use of a less hazardous metalorganic selenide, diethylselenide [(C 2 H 5 ) 2 Se: DESe], for growing CIGS films by the selenization method [17][18][19][20]. Since DESe decomposes into atomic Se more easily than H 2 Se gas or Se vapor (the bond strength of Se−C 2 H 5 (243 kJ/mol) is weaker than that of H−Se (276 kJ/mol) or Se = Se (332 kJ/mol) [21,22] ), reaction rates capable for forming CIS and CGS can be expected.…”

“…The supplying rates of DESe and the flow rates of N 2 carrier gas were 35 μmol/min and 2 L/min, respectively. The details of the selenization equipment have been described in our previous reports [18][19][20].…”