GaN-based two-dimensional surface-emitting photonic crystal lasers with AlN∕GaN distributed Bragg reflector

2008 ◽  
Vol 92 (1) ◽  
pp. 011129 ◽  
Author(s):  
Tien-Chang Lu ◽  
Shih-Wei Chen ◽  
Li-Fan Lin ◽  
Tsung-Ting Kao ◽  
Chih-Chiang Kao ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Bragg Reflector ◽  
Two Dimensional ◽  
Distributed Bragg Reflector ◽  
Dimensional Surface

Low-threshold two-dimensional distributed Bragg reflector lasers

1986 ◽  
Vol 22 (8) ◽  
pp. 427
Author(s):  
T. Nigami ◽  
I. Suemune ◽  
Y. Kan ◽  
M. Yamanishi
Keyword(s):  
Bragg Reflector ◽  
Two Dimensional ◽  
Distributed Bragg Reflector ◽  
Low Threshold

Optimization of Textured Photonic Crystal Backside Reflector for Si Thin Film Solar Cells

2006 ◽  
Vol 974 ◽  
Author(s):  
Lirong Zeng ◽  
Peter Bermel ◽  
Yasha Yi ◽  
Ning-ning Feng ◽  
Bernard A. Alamariu ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Photonic Crystal ◽  
Bragg Reflector ◽  
Thin Film Solar Cells ◽  
Etch Depth ◽  
Optimized Design ◽  
Efficiency Enhancement ◽  
Distributed Bragg Reflector ◽  
Si Thin Film

ABSTRACTA new backside reflector, textured photonic crystal, is introduced into Si thin film solar cells. Scattering matrix method is used to systematically optimize all the parameters of the two components of the backside reflector, grating and distributed Bragg reflector, to achieve the highest power conversion efficiency for a given solar cell thickness. Experimentally, Si-on-insulator solar cells are being fabricated to verify the tremendous efficiency enhancement and optimal design. It is found that while the optimal period and etch depth of the grating, the Bragg wavelength of the distributed Bragg reflector, as well as the antireflection coating thickness all decrease as the cell becomes thinner, the optimum duty cycle of the grating remains almost constant at 0.5. For a 2 μm thick cell, the relative efficiency enhancement can be as high as 52% using the optimized design.

Tunable Light Emission from GaN-Based Photonic Crystal with Ultraviolet AlN/AlGaN Distributed Bragg Reflector

2011 ◽  
Vol 50 (4S) ◽  
pp. 04DG09
Author(s):  
Cheng-Chang Chen ◽  
Ching-Hsueh Chiu ◽  
Yi-Chun Yang ◽  
M. H. Shih ◽  
Jun-Rong Chen ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Light Emission ◽  
Bragg Reflector ◽  
Distributed Bragg Reflector

Harvesting Photons in Thin Film Solar Cells with Photonic Crystals

2008 ◽  
Vol 1101 ◽  
Author(s):  
Dayu Zhoue ◽  
Rana Biswas
Keyword(s):  
Thin Film ◽  
Solar Cell ◽  
Photonic Crystal ◽  
Photonic Crystals ◽  
Antireflection Coating ◽  
Bragg Reflector ◽  
Square Lattice ◽  
Near Band Edge ◽  
Distributed Bragg Reflector ◽  
Solar Cell Performance

AbstractEnhanced light absorption and improved photon harvesting is a major avenue to improving solar cell performance. We simulate and design photonic crystal based loss-less back reflectors. The photonic crystal is a 2-dimensional photonic crystal combined with a distributed Bragg reflector. We have designed and simulated a thin film a-Si:H solar cell with the photonic crystal reflector and an antireflection coating. The photonic crystal has square lattice symmetry and generates strong diffraction of near band edge photons in the absorber layer. The absorption of red and near-IR photons is increased by more than an order of magnitude by the photonic crystal. The photonic crystals are composed of ITO and can easily serve as a conducting back contact. This scheme can be easily extended to other solar absorber layers. We have optimized the geometry of the photonic crystal to maximize absorption using rigorous scattering matrix simulations. The optical path length with the photonic crystal can improve over the limit for a random roughened scattering surface.

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