AMOLED
Active Matrix Organic Light Emitting Diode: OLED + TFT (Thin Film Transistor; active matrix tech)
One transistor per one pixel
Think of LED
Electrons + holes recombination
Photons are generated
.
.
Expensive
Limit of Large Size
Short life span
because, they’re still brand-new technology
Technologies and processes are improving
generator (APD, SH-4, USA), a spectrometer (f = 0.5 m, Acton Research Co., Spectrograph 500i, USA) and intensified photodiode array detector (Princeton Instrument co., IRY1024, USA) at room temperature.
3. Results and Discussion
3.1 Structural Properties
Fig.1. presents cross-sectional FE-SEM images of all the samples. For all the samples, the columnar shaped ZnO grains grown normal to
Ⅰ. Introduction
1.1 The reason why we chose this topic
Today, companies said they have done the differentiation strategy, but only to add new features to the product and try to increase the kinds of products. The blind differentiation strategy for differentiation finally has results that making similar or same products. It just imitates each other in the similar strategies. It's not the rea
②White emission using mixtures of CdSe quantum dots and PMMA as a phosphor
This paper explain WLED that have mixture stucture (one single chip(emit blue light) and cdse/PMMA quantum dots). CdSe quantum dots are synthesized by the wet chemical method using CdO and Se powder as precursor. And they control the size of quantum dot and mix the phospors(PMMA).
These quantum dots have three differe
High optical transmittance
Wide optical band gap
High electrical conductivity
Low cost
Non-toxicity
Good stability
Requirement of low temperature
Why is Wide band gap energy good?
It can be a very effective optoelectronic devices
There are many III-V and II-VI compound semiconductors with high bandgaps. The only high bandgap materials in…
group IV are diamond