Optoelectronic materials

In optoelectronic materials and devices, it is the luminescence properties that are of practical importance. 

Ultra-High Vacuum Reactors. CVD reactions at extremely low pressures (i.e., 10 Torr) are being developed for the deposition of semiconductor materials, such as silicon-germanium and some optoelectronic materials. Advantages appear to be better control of the deposit structure and reduction of impurities. 

Optoelectronics is a discipline which combines optics and electronics. It deals with optical wavelengths from 0.20 im (ultraviolet) to 3 im (near infrared) as shown in Fig. 15.1. The properties of optoelectronic materials are a useful combination of electrical and semiconductor properties (electron action), with optical properties such as transmission, reflection, and absorption (phonon action). 

The critical properties for optoelectronic materials are bandgap (operating range), carrier lifetime (efficiency), and resistivity (response time). To optimize these properties, it is necessary to have control of the process parameters such as ... 

The m-V and II-VI semiconductor compounds have excellent optical properties and are the most important group of optoelectronic materials, which are all produced by CVD for many optoelectronic applications. The properties of these materials and their CVD reactions are reviewed in Ch. 12, Secs. 3.0 and 4.0 and Ch. 13, Sec. 6.0. It is possible to tailor the bandgap, by the proper combination of these materials, to suit any given application (See Fig. 13.2 of Ch. 13). 

Institute of Polymer Optoelectronic Materials and Devices South China University of Technology Guangzhou, China... 

Also fascinating developments in various fields of applications such as optoelectronic-, materials- and medical applications are just barely touched. Our main intention was to put the focus on molecular fullerene chemistry. 

Introduction to Organic Electronic and Optoelectronic Materials and Devices, edited by Sam-Shajing Sun and Larry R. Dalton... 

M. Tischler, R. Collins, M. Thewalt and G. Abstreiter Silicon-Based Optoelectronic Materials, (Eds.), MRS Symposia Proceedings 290, Materials Research Society, Pittsburg, 1993. 

Khanarian, G., Ed. Molecular and Polymeric Optoelectronic Materials Fundamentals and Applications SPIE San Diego, 1986 Vol. 682. 

Among the heterocyclic derivatives, carbazole ring has emerged as a vital building block in the synthesis of many useful optoelectronic materials.93-96... 

NSOM methods can provide extremely valuable information about the functional properties of optical and optoelectronic materials.243 In many such applications, electrical potentials and/or electric fields are applied to samples as a means to induce changes in the local optical properties of the sample. Frequently, an electrified NSOM probe is employed in these studies.244 The resulting changes in... 

Hierarchically Structured Organic Optoelectronic Materials via Self-Assembly... 

The renewed interested in ZnO as an optoelectronic material has been triggered by reports on p-type conductivity, diluted ferromagnetic properties, thin film oxide field effect transistors, and considerable progress in nanostructure fabrication. All these topics are the subject of a recently published book [11],... 

The area of molecular nonlinear optics has been rejuvenated by efforts to investigate three-dimensional multipolar systems, functionalized polymers as optoelectronic materials, near infrared optical parametric oscillators and related aspects.71 There have been some advances in chromophore design for second-order nonlinear optical materials 72 these include onedimensional CT molecules, octopolar compounds and organometallics. Some of the polydiacetylenes and poly(/>-phenylenevinylene)s appear to possess the required properties for use as third-order nonlinear optical materials for photonic switching.73... 

---