Determination of the Mobility and Transport Properties of Photocarriers in BGO by the Time-of-Flight Technique

Sillenites are potentially a promising class of photorefractive materials for specific applications provided that crystals, insuring the corresponding optimal and reproducible operating characteristics, could be prepared. The first step in this direction is to measure and to check the reproducibilit...

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Bibliographic Details
Main Authors: Tapiero, M, Ennouri, A, Zielinger, J. P, Vola, J. P
Format: Report
Language:English
Subjects:
CHARGE CARRIERS
Component Reports
CRYSTALS
DETERMINATION
ELECTRON TRANSPORT
ILLUMINATION
MATERIALS
MOBILITY
MOTION
Nuclear Physics & Elementary Particle Physics
Optics
PHOTOELECTRONS
Photorefractive crystals
Photorefractive materials
REFRACTION
REPRODUCIBILITY
Sillenites
SYMPOSIA
TRANSPORT
TRAPS
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Summary:Sillenites are potentially a promising class of photorefractive materials for specific applications provided that crystals, insuring the corresponding optimal and reproducible operating characteristics, could be prepared. The first step in this direction is to measure and to check the reproducibility of the involved properties of the as-grown material obtained by the usual Czochralski technique which in fact works under relatively well defined conditions. In this respect, the determination of the mobility of photocarriers (electrons in BGO) and the knowledge of the mechanism of charge transport are of fundamental importance. Values for the mobility, mostly in BSO, ranging from 0.000001 to a few sq.cm. V(-1). s(-1) have been reported. Mobilities between 0.01 and 1 sq cm. V(-1). s(-1) usually indicate trap-limited band motion whereas lower values are more likely characteristic of multiple-trapping or hopping. This article is from 'Organization of the Optical Society of America Photonic Science Topical Meeting Series. Volume 14. Photorefractive Materials, Effects, and Devices Held in Beverly, Massachusetts on 29-31 July 1991,' AD-A253 001, p232-235.