Degradation Analysis and Degradation Suppression Technology Caused by Light Absorption at Active Layer Facet of GaInAsP Laser Diode

2008 ◽  
Vol 128 (5) ◽  
pp. 732-737
Author(s):  
Hiroyuki Ichikawa ◽  
Masashi Ito ◽  
Chie Fukuda ◽  
Kotaro Hamada ◽  
Akira Yamaguchi ◽  
...  
Keyword(s):  
Active Layer ◽  
Laser Diode ◽  
Light Absorption ◽  
Degradation Analysis

Improving light absorption of active layer by adjusting PEDOT:PSS film for high efficiency Si-based hybrid solar cells

Solar Energy ◽  
2021 ◽  
Vol 228 ◽  
pp. 299-307
Author(s):  
Zhongliang Gao ◽  
Ting Gao ◽  
Qi Geng ◽  
Guilu Lin ◽  
Yingfeng Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
Active Layer ◽  
Light Absorption ◽  
High Efficiency ◽  
Hybrid Solar Cells

A wrinkled structure with broadband and omnidirectional light-trapping abilities for improving the performance of organic solar cells with low defect density

Nanoscale ◽  
2019 ◽  
Vol 11 (46) ◽  
pp. 22467-22474 ◽  
Author(s):  
Kong Liu ◽  
Yang Sun ◽  
Qicong Li ◽  
Cheng Yang ◽  
Muhammad Azam ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transport ◽  
Active Layer ◽  
Organic Solar Cells ◽  
Light Absorption ◽  
Defect Density ◽  
Light Trapping ◽  
Transport Efficiency ◽  
Wrinkled Structure

A wrinkled structure could enhance omnidirectional light absorption in the organic active layer and charge transport efficiency at the interface.

High Speed Transient Temperature Profile Control Using Adjoint-Based Optimal Control Scheme

2011 ◽  
Author(s):  
Satoru Ito ◽  
Yuji Suzuki
Keyword(s):  
Optimal Control ◽  
Temperature Profile ◽  
Active Layer ◽  
Laser Diode ◽  
High Speed ◽  
Transient Temperature ◽  
Control Input ◽  
Control Scheme ◽  
Profile Control ◽  
Optimal Control Scheme

Optimal control scheme for transient temperature profile inside electronic devices such as pulsed laser diode is developed based on the adjoint equation of one-dimensional heat conduction. Joule heating with a thin-film heater is employed as the control input in order to minimize temperature changes of a thin active layer embedded in a modeled laser diode. In numerical simulations assuming the light-emitting time period of 1 μs, temperature variation of the active layer is successfully suppressed by 80% with the heat input prior to the onset of the laser pulse. It is found that the Fourier number of the layer between the control heater and the active layer is the key parameter to minimize the temperature fluctuations. We also successfully demonstrate suppression of the temperature change in a MEMS-based experimental setup.

scholarly journals Light Absorption Enhancement in Organic Solar Cell by Embedding Ag Nanoparticles and Nanochains within the Active Layer

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Sheng-Qing Zhu ◽  
Tong Zhang ◽  
Xin-Li Guo ◽  
Feng Shan ◽  
Xiao-Yang Zhang
Keyword(s):  
Active Layer ◽  
Light Absorption ◽  
Ag Nanoparticles ◽  
Organic Solar Cell ◽  
Organic Photovoltaic ◽  
Localized Surface Plasmon ◽  
Absorption Enhancement ◽  
Long Wavelength ◽  
Monodisperse Nanoparticles ◽  
Different Types

We numerically investigate the light absorption enhancement of organic photovoltaic cells by embedding Ag nanoparticles and nanochains within the active layer using a finite element method. We analyze the enhancement mechanism of light absorption and systematically study the influence of factors such as the size and the period of silver nanoparticles. The result shows the localized surface plasmon resonance of the particles has a significant influence on the light absorption. Under AM1.5 illumination condition, a relative enhancement with a factor of 107.1% is observed for nanoparticles with a diameter of 30 nm and a period of 200 nm. In addition, different types of nanochain structures have been studied, and we find that, comparing to monodisperse nanoparticles, nanochain structures can further enhance the light absorption because of the stronger light harvesting in the long wavelength range of 600–800 nm.

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