Open AccessОбразование акцепторных центров в CdHgTe под воздействием воды и термообработок
Author(s) -
Г.Ю. Сидоров,
Ю.Г. Сидоров,
В.А. Швец,
В.С. Варавин
Publication year - 2021
Publication title -
fizika i tehnika poluprovodnikov
Language(s) - English
Resource type - Journals
eISSN - 1726-7315
pISSN - 0015-3222
DOI - 10.21883/ftp.2021.04.50734.9560
Subject(s) - boiling , refractive index , oxide , chemistry , chemical engineering , materials science , analytical chemistry (journal) , inorganic chemistry , environmental chemistry , organic chemistry , optoelectronics , engineering
Influence storage and boiling in deionized water and heat treatments of epitaxial films CdxHg1-xTe on the Hall and ellipsometric parametres is investigated. Water treatment reduces refractive index of native CdxHg1-xTe oxide from 2.1 to 1.2-1.4. It means that matter with a lower refractive index, such as water, is introduced in the oxide. Boiling in water leads to formation of acceptors in CdxHg1-xTe with concentrations up to 1019 cm-3. Change of medium’s pH from alkaline to the acidic decreases the speed of acceptors formation. Heat treatments after storage in water also leads to formation of acceptors. The conclusion is made, that water medium or water absorbed by native oxide layer leads to formation of acceptors in CdxHg1-xTe. Concentration of acceptors grows with temperature of treatments and quantity of accessible water.