Recent progress and problems in high field electroluminescence of inorganic materials

Hiroshi Kobayashi

doi:10.1117/12.151162

27 August 1993 Recent progress and problems in high field electroluminescence of inorganic materials

Hiroshi Kobayashi

Proceedings Volume 1910, Electroluminescent Materials, Devices, and Large-Screen Displays; (1993) https://doi.org/10.1117/12.151162
Event: IS&T/SPIE's Symposium on Electronic Imaging: Science and Technology, 1993, San Jose, CA, United States

Abstract

High-field electroluminescence (EL) of inorganic materials are of basic and practical interest. There are two types of the high field EL; one is a thin film EL (TFEL) and the other is a powder type. Recent researches are mainly on TFEL. In this paper, recent progress on TFEL will be discussed and reviewed. Features of high field TFEL are as follows: (1) Strength of electric field is as high as 10⁶V/cm. This is quite different from light emitting diode (LED) of p-n junction. (2) EL phosphor materials are composed of host and luminescent centers; the host materials are wide gap semiconductors of ZnS and IIa-VIb (CaS, SrS) etc. The luminescent centers are ions which show intra-shell transitions for f-f or f-d transitions (rare-earth ions; Tb³⁺, Tm³⁺, Ce³⁺ etc.) and of d-d transitions (Mn²⁺ etc.). (3) Excitation mechanisms are not yet well understood and should be clarified, of (a) carrier generation and injection, (b) hot electron transport and distribution function, and (c) excitation mechanism of luminescent centers. Problems to be solved is color, especially blue EL materials. To solve this, a new material should be developed, and in addition, a new structure of multi-layer of quantum-well structure should be investigated.

Citation Download Citation

Hiroshi Kobayashi "Recent progress and problems in high field electroluminescence of inorganic materials", Proc. SPIE 1910, Electroluminescent Materials, Devices, and Large-Screen Displays, (27 August 1993); https://doi.org/10.1117/12.151162

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