Crystal structure of κ-In2Se3

Abstract

Structural properties of single-phase films of κ-In 2 Se 3 and γ-In 2 Se 3 were investigated.Both films were polycrystalline but their microstructure differed considerably. The alattice parameter of κ-In 2 Se 3 has been measured. Comparison between these two materials indicates that κ-In 2 Se 3 has a significantly larger unit cell (∆c = 2.5 ± 0.2 % and ∆a = 13.5 ± 0.5 %) and a structure more similar to the α-phase of In 2 Se 3 . a)

Optical-memory switching and oxygen detection based on the CVT grown γ- and α-phase In2Se3

“…The layered crystals of ␣ and ␥ phases have been simultaneously grown by the CVT method at different high temperatures. The structural phases and optical properties of the layered ␥-and ␣-In 2 experimental results of laser-induced photodarkening and annealing recovery test show that the ␥-In 2 Se 3 possesses an erasable read/write optical-memory function with well-behaved phase changed capability. The erasable read/write function can be attributed to the ␥ ↔ ␣ inter-phase transition inside the microscale polycrystalline ␥-In 2 Se 3 layers.…”

“…Diindium triselenide (In 2 Se 3 ) is a III-VI compound which possesses at least five crystal modifications: ␣ (two-layer hexagonal, 2H), ␤ (three-layer rhombohedral, 3R), ␥ (defect wurtzite in hexagonal, H), ␦, and [1,2]. The ␦ and are meta stable phases of diindium triselenide formed at different high temperatures.…”

The growth of single-phase In2Se3 by using metal organic chemical vapor deposition with AlN buffer layer

“…[6] The defect Wurtzite structure is basically a Wurtzite structure but 1 3 of its cationic sites are vacant. In this structure, it was reported that the In vacancies take screw arrangements and that large optical rotatory power is observed [7,8].…”

Structural and optical characterization of single-phase γ-In2Se3 films with room-temperature photoluminescence

“…The In 2 Se 3 (IS) compound semiconductors have several different crystalline phase, i.e., layered structure (␣-phase) [1], rhombohedral structure (␤-phase) [2,3], defect wurtzite structure (␥-phase) [4] and anisotropic structure (-phase) [5]. Recently, ␥-In 2 Se 3 is found to be a promising candidate that can be used for Cd-free buffer layer for CIGS solar cell [6].…”