在600℃封闭系统中Hg0.8Cd0.2Te的热处理

应用科学学报 ›› 1984, Vol. 2 ›› Issue (3): 195-202.

在600℃封闭系统中Hg_0.8Cd_0.2Te的热处理

夏义本¹, 曹泽淳¹, 汤定元²

1. 上海科学技术大学;
2. 中国科学院上海技术物理研究所

收稿日期:1982-09-11 出版日期:1984-09-30 发布日期:1984-09-30

HEAT TREATMENT OF Hg_0.8Cd_0.2Te AT 600℃ IN A CLOSED SYSTEM

XIA YIBEN¹, CAO ZECHUN¹, TANG DINGYUAN²

1. Shanghai University of Science and Technology;
2. Shanghai Institute of Technical Physics, Academia Sinica

Received:1982-09-11 Online:1984-09-30 Published:1984-09-30

摘要/Abstract

摘要： 采用汞空位扩散模式,解释了高温(600℃)短时间(10'~15')热处理后使Hg_0.8Cd_0.2Te变成P型的现象,把热处理后样品逐层减薄,同时用范德堡法^[1]在77K (液氮温度)下进行霍尔测量,得出在不同汞压、不同时间下样品中汞空位的分布.由此验证了汞空位扩散模式,并计算得600℃下Hg_0.8Cd_0.2Te中汞空位扩散系数D_L为2×10⁵微米²/小时左右;汞空位最终浓度L_f与汞压成反比,其比例常数(K_F)/K_i为5×10¹⁹·厘米^-3大气压;汞空位激活能Q为0.6电子伏特左右.

Abstract: The P-type conversions of Hg_0.8Cd_0.2Te after short-time (10'-15') heat treatment at high-temperature (600℃) are explained by mercury-vacancy diffusion, model, the heat treatmented samples are thinned step by step, and the Hall coefficients and resistivities are measured at 77 K for each step. The distributions of mercury vacancy in the samples are thus found from these measurements It is found that the experimental results are in good agreement with the mercury-vacancy diffusion model. The diffusion cofficient of meroury vacancy in Hg_0.5Cd_0.2Te at 600℃ is estimated to be about 2×10⁵μm²/h. Its activation energy Q is about 0.6eV. The final concentration of mercury vacancy in the samples, L_f varies inversely as Hg-presure in the closed system. Its proportionality factor, K_f/K_i is 5×10¹⁹cm^-3atm.

夏义本, 曹泽淳, 汤定元. 在600℃封闭系统中Hg_0.8Cd_0.2Te的热处理[J]. 应用科学学报, 1984, 2(3): 195-202.

XIA YIBEN, CAO ZECHUN, TANG DINGYUAN. HEAT TREATMENT OF Hg_0.8Cd_0.2Te AT 600℃ IN A CLOSED SYSTEM[J]. Journal of Applied Sciences, 1984, 2(3): 195-202.