SBLED - Super bright light-emitting diode using nanophotonics

Diodes as a replacement of incandescent lamps. The project will increase the light intensity in diodes by making progress within nanophotonics. Besides they will develop a low-cost method to fabricate the materials.
 

Green color light-emitting diodes (LEDs) has the lowest efficiency compared to the other two primary colors red and blue, which is called green gap. It is crucial to improve the efficiency of green LEDs in order to make high efficiency white LED light source by mixing the 3 primary colors together. This project applies the advances in nanophotonics to improve the efficiency of green LEDs, i.e. surface plasmonics and photonic crystals. By applying nanorod dielectric intermediate layer (SiN and SiO2) between GaN surface and metallic nanoparticles, the photoluminescence (PL) of green LEDs has been increased by more than 10 times. The PL of green nanopillar LEDs is also increased by a factor of 8 after the surface treatment.
Project description

Super bright (SB) light-emitting diodes (LEDs), representing the most promising future light source to substitute the low energy-efficiency incandescent lamp, is to be achieved in this project by exploring recent advances in nanophotonics, i.e. photonic quasi-crystals (PQC) and surface plasmons (SP).
SB LEDs with enhanced efficiency and controlled emission profile will be designed, fabricated and characterized in this project, which will benefit from the collaboration of Chinese and Danish partners with their complementary equipment of expertise.
This project gathers top scientists on LED Metal-organic chemical vapour deposition (MOCVD), simulation and modelling of nanostructures for LED efficiency enhancement, nanofabrication and LED characterization. These experts are the most active players in the field of LED from China and Denmark, i. e. Semiconductor Lighting Research and Development Center, Chinese Academy of Science (CAS), Beijing Jiaotong University (BJTU) and Department of Photonics Engineeing, Technical University of Denmark (DTU).
In addition, a low-cost nanofabrication method to fabricate this SBLED will be developed with the assistance of NIL Technology APS. The synergy of the overall expertises and resources would help creating a critical mass in this area, thereby placing DTU on the world map in the field of research.
 

Key figures

Period:
2012 - 2016
Funding year:
2011
Own financial contribution:
0.81 mio. DKK
Grant:
4.20 mio. DKK
Funding rate:
84 %
Project budget:
5.01 mio. DKK

Category

Programme
Innovationsfonden
Technology
Energy efficiency
Case no.
ENMI 11-116393

Participants

Danmarks Tekniske Universitet (DTU) (Main Responsible)
Partners and economy
Partner Subsidy Auto financing
Danmarks Tekniske Universitet (DTU) 4,20 mio. DKK 0,39 mio. DKK
Chinese Academy of Science 0,35 mio. DKK
Beijing Jiaotong University 0,06 mio. DKK

Energiforskning.dk - informationportal for danish energytechnology research- og development programs.

Logo innovationsfonden
Logo for EUDP
Logo for elforsk