This article explains in details about the background, content, academic significance and contribution to the social development of the invention of GaN-based blue light emission diode (LED), which was awarded the 2014 Nobel Prize in Physics. It also analyzes the development trend of the nitride wide bandgap semiconductors. Based on the story of assiduous research work of the three Nobel prize winners, and the evaluation standard of the Nobel prize committee, the article makes comments on the positive experiences from this awarding to our country, in terms of the construction way of physical science, the relationship between fundamental and applied physics, and the standard of evaluating the research achievements.

nitride wide bandgap semiconductors  /  blue light emission diode  /  development trend  /  positive experiences