Today, I have an opportunity to study about nanocrystal QDs. QDs stand for Quantum Dots that are a zero dimension semiconductor structures confined electrons and holes in discrete quantized energy insight dots. When electrons and holes recombined, they emitted light in many wavelength depend on energy gap. The many color light of nanocrystal QDs is be used in many application such as LED (Light Emitting Didode) for LED displays, traffic light, mobile phone ,white LED for flash-light, car light that give high intensity, electrochromic displays and diode lasers. They also prepared to apply for future device like quantum dot solar cell or nanocrystal solar cell, quantum computer.
Technology brings the convenience for human life, but everything has both bright and dark sides depend on ourselves that know how to use and control in the limitation not just use and use until caused the problem like green house effect.
References
http://en.wikipedia.org/wiki/Quantum_dot
http://www.evidenttech.com/applications/quantum-dot-applications.php
http://quantumdot.lanl.gov/pages/Publications/Klimov_LAscience.pdf
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