supported by the National Key R&D Program of China (2016YFB0400603)
Flexible light-emitting diodes(LEDs)are highly desired for wearable devices,flexible displays,robotics,biomedicine,etc.Traditionally,the transfer process of an ultrathin wafer of about 10–30μm to a flexible substrat...
supported by the National Natural Science Foundation of China(No.61006053)
This study proposes a practical method to estimate the junction temperature of AlGaInP LEDs using the luminescence spectra method.The peak wavelength shift of LEDs is due to the energy band gap shrinking.The temperatu...
Project supported by the Post Doctoral Innovation Fund of Shandong Province(No.201303002);the Shandong Province Young and MiddleAged Scientists Research Awards Fund(No.BS2013DX007);the the National Basic Research Program of China(No.6131550102)
We demonstrate and introduce here a pyramidally patterned metal reflector into wafer-bonding AlGaInP light emitting diodes (LEDs) to improve the light extraction efficiency by using a photo-assisted chemical etched ...
An Al0.13GalnP sub-cell used as the top cell in the next generation of high efficiency multi-junction solar cells is fabricated. An efficiency of 10.04% with 1457.3 mV in Voc and 11.9 mA/cm2 in Isc was obtained. QE co...
The correlation model between dark current RTS noise and defects for A1GalnP multiple-quantum-well laser diode is derived. Experimental results show that dark current RTS noise caused carrier number fluctuations at th...
Project supported by the Natural Science Foundation of Beijing(No.4092007);the National High Technology Research and Development Program of China(Nos.2008AA03Z402,2009AA03A1A3)
The path of photons in the thin film (TF) light emitting diode (LED) was analyzed. The reflectivity of reflector in AlGaInP TF LED with and without the AlGaInP layer was contrasted. The absorption of the AlGaInP l...
Project supported by the Natural Science Foundation of Beijing,China(No.4092007);the National High Technology Research and Development Program of China(Nos.2008AA03Z402,2009AA03A1A3)
The reflectivity versus incident angle of a GaP/Au reflector, a GaP/SiO2/Au triple ODR (omni-directional reflector) and a GaP/ITO/Au triple ODR was calculated. Compared to A1GaInP LEDs with a GaAs absorbing substrat...
supported by the National High Technology Research and Development Program of China (No.2006AA03A121);the State Key Development Program for Basic Research of China (No.2006CB604900);the Fund of Beijing University of Technology (No.ykj-2007-1073)
A kind of AlGaInP light emitting diode (LED) with surface anti-reflecting structure has been introduced to solve the problems of low light efficiency and restricted luminous intensity. The new structure can be demon...
supported by the the National High Technology Research and Development Program of China(Nos.2008AA03Z402,SQ200703Z431230);the Beijing National Science Foundation (No. 4092007);the Talent Promoting Education of Beijing, China (No. 05002015200504)
Three aging experiments were performed for AlGaInP light emitting diodes(LED) with or without indium tin oxide(ITO),which is used as a current spreading layer.It was found that the voltage of the LED with an ITO f...
We solve the single mode coupled rate equations by computer,simulate the behavior of a gain switch of an AlGaInP red light semiconductor laser diode,and find the characteristic of FWHM of pulses changing with the ampl...