Bước đột phá mới trong việc cải tiến đèn LED
Cập nhật: 07:38 02/10/2014 GMT+7
Các nhà nghiên cứu tại Đại học Princeton (Mỹ) đã thực hiện một bước đột phá đáng kể trong việc cải thiện độ sáng và hiệu quả của đèn LED.
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