The Influence of a Piezoelectric Field on the Dynamic Performance of GaN-Based Green Light-Emitting Diodes With an InGaN Insertion Layer

NCU Institutional Repository > 資訊電機學院 > 電機工程學系 > 期刊論文 > Item 987654321/52112

請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/52112

題名:	The Influence of a Piezoelectric Field on the Dynamic Performance of GaN-Based Green Light-Emitting Diodes With an InGaN Insertion Layer
作者:	Shi,JW;Kuo,FM;Huang,HW;Sheu,JK;Yang,CC;Lai,WC;Lee,ML
貢獻者:	電機工程學系
日期:	2011
上傳時間:	2012-03-28 10:15:45 (UTC+8)
出版者:	國立中央大學
摘要:	In this letter, the mechanism for improvement of the dynamic performance of GaN-based light-emitting diodes with an InGaN insertion layer is investigated using the very fast electrical-optical pump-probe technique. Our measurements indicate that, when the bias current is relatively low (100 A/cm(2)), the device with the InGaN insertion layer (device A) exhibits a shorter response time than does the control (device B) without such a layer. However, when the bias current density reaches 0.5 kA/cm(2), devices A and B exhibit exactly the same response time during operation from room temperature to 200 degrees C. These results indicate that, under low current density (100 A/cm(2)), the piezoelectric (PZ) field inside device A will be stronger, which should result in a lower effective barrier height with a shorter carrier escape time than is the case for device B. On the other hand, under high bias current density, both devices have the same internal response time, which indicates the screening of the PZ field inside due to injected carriers. These dynamic measurement results suggest that the origin of the efficiency droop in our device under low and high bias current densities is carrier leakage and the Auger effect, respectively.
關聯:	IEEE ELECTRON DEVICE LETTERS
顯示於類別:	[電機工程學系] 期刊論文

文件中的檔案:

檔案	描述	大小	格式	瀏覽次數
index.html		0Kb	HTML	471	檢視/開啟

在NCUIR中所有的資料項目都受到原著作權保護.

社群 sharing

資料載入中.....