Minority carrier mobility measurement in HgCdTe with light-modulated Hall effect

Fei Yin; Bo Zhang

doi:10.1117/12.843162

12 October 2009 Minority carrier mobility measurement in HgCdTe with light-modulated Hall effect

Fei Yin, Bo Zhang

Proceedings Volume 7518, Photonics and Optoelectronics Meetings (POEM) 2009: Solar Cells, Solid State Lighting, and Information Display Technologies; 75180O (2009) https://doi.org/10.1117/12.843162
Event: Photonics and Optoelectronics Meetings 2009, 2009, Wuhan, China

Abstract

The light modulated Hall measurement system was set up in order to measure the minority carrier mobility of the p-type HgCdTe material. Minority carrier mobility is one of the main parameters for HgCdTe infrared photodetectors, because it determines the diffusion length of minority carriers, which plays a big role in the performance of optoelectronic devices. Therefore, it is important to get the minority carrier mobility in HgCdTe, so as to evaluate the material property before fabrication of photodetectors. By adding a modulated laser to the Hall system, the modulated Hall voltage was measured on p-type Hg_1-xCd_xTe(x=0.233) sample over a range of 0-1.8T in the magnetic field at temperature of 75K. The modulated signal is generated by the movement of excess photocarriers in the magnetic field, so it has a relationship with the magnetic field, the photogenerated carrier concentration and the electron and hole mobilities. Since the majority concentration and mobility can be derived from the Hall effect, the minority mobility and the photogenerated carrier concentration were obtained from fitting the light-modulated Hall voltage ▵V_H as a function of the magnetic field B. As compared to the references, the minority mobility we have obtained is reasonable, so the light-modulated Hall effect is an effective way to obtain the minority carrier mobility.

Citation Download Citation

Fei Yin and Bo Zhang "Minority carrier mobility measurement in HgCdTe with light-modulated Hall effect", Proc. SPIE 7518, Photonics and Optoelectronics Meetings (POEM) 2009: Solar Cells, Solid State Lighting, and Information Display Technologies, 75180O (12 October 2009); https://doi.org/10.1117/12.843162

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available