高显色指数高光效的新型量子点转换LED

doi:10.11949/j.issn.0438-1157.20170614

化工学报 ›› 2017, Vol. 68 ›› Issue (S1): 247-253.DOI: 10.11949/j.issn.0438-1157.20170614

高显色指数高光效的新型量子点转换LED

程焱华, 谢斌, 罗小兵

华中科技大学能源与动力工程学院, 湖北武汉 430074

收稿日期:2017-05-15 修回日期:2017-05-22 出版日期:2017-08-31 发布日期:2017-08-31
通讯作者: 罗小兵,luoxb@hust.edu.cn
基金资助:
国家自然科学基金项目（51625601，51576078，51376070）。

New quantum dots-converted light-emitting diodes with high color rendering index and high efficiency

CHENG Yanhua, XIE Bin, LUO Xiaobing

School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China

Received:2017-05-15 Revised:2017-05-22 Online:2017-08-31 Published:2017-08-31
Supported by:
supported by the National Natural Science Foundation of China (51625601,51576078,51376070).

摘要/Abstract

摘要：

研究了胶体固化温度对高性能量子点白光LED的光学性能的影响。首先运用一种新结构的光转换材料量子点-介孔硅微球，将其与荧光粉和硅胶共混形成荧光胶体，点涂到蓝光芯片上形成一种新型的量子点转换LED。相比传统的LED，这种新型LED的光效提升56%，显色指数Ra达96，在20~400 mA电流驱动下Ra维持在92以上。随后分析胶体固化温度对其光学性能的影响，并分析了物理机制。结果表明：在100℃固化时光效和Ra衰减均较严重；60℃固化时光效衰减很小，Ra的衰减约为100℃时的1/2。衰减的原因是固化积累的热量影响了量子点本身的性能，从而影响光功率大小，最终导致光效和Ra的衰减。

关键词: 纳米材料, 量子点, 聚合物, 固态照明, 传热

Abstract:

In order to investigating the effect of heat on quantum dots(QDs)-converted light-emitting diodes(LEDs) and pursuing the excellent performance of QDs-converted LEDs,Quantum dots-mesoporous silica(QDMS) was prepared to mix with phosphor and silica resin,which was packaged onto a blue chip,forming a new type of QDs-converted LED. The light conversion efficiency(LCE) and color rendering index(CRI) of the new QDs-converted LED and traditional phosphor-converted LED were respectively measured and compared. The impact of changing current on the performance of the new type of LED was explored. Finally,the light power of the new type of LED before and after solidification were measured,which was solidified respectively in 100℃ and 60℃. Results suggested that the LCE of the new type of LED reached 110 lm·W^-1,improved by about 56% relative to phosphor-converted LED,CRI attained 96(maximum is 100) and remained above 92 driven by current varing from 20 to 400 mA,which demonstrated that the new type of QDs-converted LED possess obvious advantages compared to the traditional phosphor-converted LED. The decline of the LCE and CRI through solidification of the new type of LED solidified under 60℃ were approximately half of that under 100℃,which revealed that heat transfer must be considered carefully during the fabrication of QDs-converted LED.

Key words: nanomaterials, quantum dots, polymers, solid state lighting, heat transfer

中图分类号:

TQ127.2
TN31

程焱华, 谢斌, 罗小兵. 高显色指数高光效的新型量子点转换LED[J]. 化工学报, 2017, 68(S1): 247-253.

CHENG Yanhua, XIE Bin, LUO Xiaobing. New quantum dots-converted light-emitting diodes with high color rendering index and high efficiency[J]. CIESC Journal, 2017, 68(S1): 247-253.

参考文献 29

[1]	LUO X B,HU R,LIU S,et al. Heat and fluid flow in high-power LED packaging and applications[J]. Progress in Energy and Combustion Science,2016,56:1-32.
[2]	XIE R J,HIROSAKI N,MITOMO M,et al. Highly efficient white-light-emitting diodes fabricated with short-wavelength yellow oxynitride phosphors[J]. Applied Physics Letters,2006,88(10):101104.
[3]	PARK J K,CHOI K J,YEON J H,et al. Embodiment of the warm white-light-emitting diodes by using a Ba2+ codoped Sr3SiO5:Eu phosphor[J]. Applied Physics Letters,2006,88(4):043511.
[4]	PARK H K,OH J H,KANG H,et al. Hybrid 2D photonic crystal-assisted Lu3Al5O12:Ce ceramic-plate phosphor and free-standing red film phosphor for white LEDs with high color-rendering index[J]. ACS Appllied Materials & Interfaces,2015,7(8):4549-4559.
[5]	NIZAMOGLU S,ERDEM T,SUN X W,et al. Warm-white light-emitting diodes integrated with colloidal quantum dots for high luminous efficacy and color rendering[J]. Optics Letters,2010,35(20):3372-3374.
[6]	MUKAI K. Semiconductor quantum dots for future optical applications[J]. Journal of Nanoscience and Nanotechnology,2014,14(3):2148-2156.
[7]	CUI L,HE X P,CHEN G R. Recent progress in quantum dot based sensors[J]. RSC Advances,2015,5(34):26644-26653.
[8]	WU J,CHEN S,SEEDS A,et al. Quantum dot optoelectronic devices:lasers,photodetectors and solar cells[J]. Journal of Physics D:Applied Physics,2015,48(36):363001.
[9]	QASIM K,LEI W,LI Q. Quantum dots for light emitting diodes[J]. Journal of Nanoscience and Nanotechnology,2013,13(5):3173-3185.
[10]	ERDEM T,DEMIR H V. Color science of nanocrystal quantum dots for lighting and displays[J]. Nanophotonics,2013,2(1):57-81.
[11]	VASUDEVAN D,GADDAM R R,TRINCHI A,et al. Core-shell quantum dots:properties and applications[J]. Journal of Alloys and Compounds, 2015,636:395-404.
[12]	XIE B,HU R,LUO X B. Quantum dots-converted light-emitting diodes packaging for lighting and display:status and perspectives[J]. Journal of Electronic Packaging,2016,138(2):020803.
[13]	ZHUO H,ZHUO G,ZHUO J,et al. High luminescent core-shell QDs based on noninjection synthesized CdSe QDs:observation of magic sized CdSe quantum dots[J]. RSC Advanced,2014,4(80):42316-42325.
[14]	WOO J Y,KIM K,JEONG S,et al. Enhanced photoluminance of layered quantum dot-phosphor nanocomposites as converting materials for light emitting diodes[J]. Journal of Physical Chemistry C,2011,115(43):20945-20952.
[15]	JANG E P,SONG W S,LEE K H,et al. Preparation of a photo-degradation-resistant quantum dot-polymer composite plate for use in the fabrication of a high-stability white-light-emitting diode[J]. Nanotechnology,2013,24(4):045607.
[16]	SONG W S,LEE S H,YANG H. Fabrication of warm,high CRI white LED using non-cadmium quantum dots[J]. Optical Materials Express,2013,3(9):1468-1473.
[17]	JANG H S,YANG H,KIM S W,et al. White light-emitting diodes with excellent color rendering based on organically capped CdSe quantum dots and Sr3SiO5:Ce3+,Li+ phosphors[J]. Advanced Materials,2008,20(14):2696-2702.
[18]	LEE J,SUNDAR V C,HEINE J R,et al. Full color emission from Ⅱ-Ⅵ semiconductor quantum dot-polymer composites[J]. Advanced Materials,2000,12(15):1102-1105.
[19]	JANG E,JUN S,JANG H,et al. White-light-emitting diodes with quantum dot color converters for display backlights[J]. Advanced Materials,2010,22(28):3076-3080.
[20]	JANG J W,KIM J S,KWON O H,et al. UV-curable silicate phosphor planar films printed on glass substrate for white light-emitting diodes[J]. Optics Letter,2015,40(16):3723-3726.
[21]	SHER C W,LIN C H,LIN H Y,et al. A high quality liquid-type quantum dot white light-emitting diode[J]. Nanoscale,2016,8(2):1117-1122.
[22]	KANE M H,JIAO J,DIETZ N,et al. High color rendering index of remote-type white LEDs with multi-layered quantum dot-phosphor films and short-wavelength pass dichroic filters[J]. Proceedings of SPIE,2014,9190:919013-919018.
[23]	SONG W S,KIM J H,LEE J H,et al. Synthesis of color-tunable Cu-In-Ga-S solid solution quantum dots with high quantum yields for application to white light-emitting diodes[J]. Journal of Materials Chemistry,2012,22(41):21901.
[24]	SHIN M H, HONG H G,KIM H J,et al. Enhancement of optical extraction efficiency in white LED package with quantum dot phosphors and air-gap structure[J]. Applied Physics Express,2014,7(5):052101.
[25]	JANG E,JUN S,JANG H,et al. White-light-emitting diodes with quantum dot color converters for display backlights[J]. Advanced Materials,2010,22(28):3076-3080.
[26]	XIE B,HU R,YU X,et al. Effect of packaging method on performance of light-emitting diodes with quantum dot phosphor[J]. IEEE Photonics Technology Letters,2016,28(10):1115-1118.
[27]	XIE B,CHEN W,HAO J,et al. Structural optimization for remote white light-emitting diodes with quantum dots and phosphor:packaging sequence matters[J]. Optics Express, 2016,24(26):A1560-A1570.
[28]	CHEN W,WANG K,HAO J,et al. Highly efficient and stable luminescence from microbeans integrated with Cd-free quantum dots for white-light-emitting diodes[J]. Particle & Particle Systems Characterization, 2015,32(10):922-927.
[29]	CHEN H S,HSU C K,HONG H Y. InGaN-CdSe-ZnSe quantum dots white LEDs[J]. IEEE Photonics Technology Letters,2006,18(1):193-195.

高显色指数高光效的新型量子点转换LED

New quantum dots-converted light-emitting diodes with high color rendering index and high efficiency

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