scholarly journals Two-step photon up-conversion solar cells

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Shigeo Asahi ◽  
Haruyuki Teranishi ◽  
Kazuki Kusaki ◽  
Toshiyuki Kaizu ◽  
Takashi Kita
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Energy Conversion ◽  
Conversion Efficiency ◽  
High Efficiency ◽  
Transmission Loss ◽  
Energy Conversion Efficiency ◽  
High Potential ◽  
Next Generation ◽  
Inas Quantum Dots

Abstract Reducing the transmission loss for below-gap photons is a straightforward way to break the limit of the energy-conversion efficiency of solar cells (SCs). The up-conversion of below-gap photons is very promising for generating additional photocurrent. Here we propose a two-step photon up-conversion SC with a hetero-interface comprising different bandgaps of Al0.3Ga0.7As and GaAs. The below-gap photons for Al0.3Ga0.7As excite GaAs and generate electrons at the hetero-interface. The accumulated electrons at the hetero-interface are pumped upwards into the Al0.3Ga0.7As barrier by below-gap photons for GaAs. Efficient two-step photon up-conversion is achieved by introducing InAs quantum dots at the hetero-interface. We observe not only a dramatic increase in the additional photocurrent, which exceeds the reported values by approximately two orders of magnitude, but also an increase in the photovoltage. These results suggest that the two-step photon up-conversion SC has a high potential for implementation in the next-generation high-efficiency SCs.

Enhanced broadband spectral response and energy conversion efficiency for hetero-junction solar cells with graded-sized Si quantum dots/SiC multilayers

2015 ◽  
Vol 3 (46) ◽  
pp. 12061-12067 ◽  
Author(s):  
Yunqing Cao ◽  
Jun Xu ◽  
Zhaoyun Ge ◽  
Yingying Zhai ◽  
Wei Li ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Energy Conversion ◽  
Conversion Efficiency ◽  
Spectral Response ◽  
Energy Conversion Efficiency ◽  
Cell Performance ◽  
Novel Structure ◽  
Si Quantum Dots

We propose a novel structure of a graded-sized Si QDs/Si hetero-junction cell, which exhibits broadband spectral response and improved cell performance.

scholarly journals Photo-energy Conversion Efficiency of CH3NH3PbI3/C60 Heterojunction Perovskite Solar Cells from First-principles

2021 ◽  
Author(s):  
Khian-Hooi Chew ◽  
Riichi Kuwahara ◽  
Kaoru Ohno
Keyword(s):  
Solar Cells ◽  
Energy Conversion ◽  
Conversion Efficiency ◽  
First Principles ◽  
Perovskite Solar Cells ◽  
Energy Conversion Efficiency ◽  
Potential Candidate ◽  
Next Generation ◽  
First Principles Study ◽  
Halide Perovskites

Halide perovskites have emerged as the most potential candidate for the next-generation solar cells. In this work, we conduct a comprehensive first-principles study on the photo-energy conversion efficiency (PCE) of...

A strategy to improve the energy conversion efficiency and stability of quantum dot-sensitized solar cells using manganese-doped cadmium sulfide quantum dots

2015 ◽  
Vol 44 (2) ◽  
pp. 630-638 ◽  
Author(s):  
Chandu V. V. M. Gopi ◽  
M. Venkata-Haritha ◽  
Soo-Kyoung Kim ◽  
Hee-Je Kim
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Quantum Dot ◽  
Energy Conversion ◽  
Cadmium Sulfide ◽  
Conversion Efficiency ◽  
Energy Conversion Efficiency ◽  
Sensitized Solar Cells ◽  
Mn Doped

Better stability and higher performance of Mn-doped CdS QDSSCs (PCE = 2.85%) than those of CdS QDSSCs (PCE = 2.11%).

Developments of Solar Cell Materials and Fabrication Technology and their Effects on Energy Conversion Efficiency

2013 ◽  
Vol 378 ◽  
pp. 293-301 ◽  
Author(s):  
Yin Dong Yang ◽  
Paul Wu ◽  
Jason Deng ◽  
Mansoor Barati ◽  
Alex McLean
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Energy Conversion ◽  
Conversion Efficiency ◽  
High Efficiency ◽  
Crystalline Silicon ◽  
Low Cost ◽  
Energy Conversion Efficiency ◽  
Black Silicon ◽  
Improve Energy Efficiency

This paper reviews the present status and future developments of solar cell materials for photovoltaic (PV) application. The solar cell made from different materials, such as silicon with different structures, cadmium telluride (CdTe), gallium arsenide GaAs), copper indium gallium diselenide (CIGS) and polymers are compared in theoretical ability, energy conversion efficiency, production and maintenance costs as well as environmental effects. Several important strategies to improve energy efficiency, such as anti-reflective coating (ARC), multi-junction concentrator and black silicon technique that improve the light-trapping and absorption properties of solar cells, are discussed. The review results show that the most efficient solar cells achieved 50% energy conversion, whereas silicon-based PV cells can reach 27%. Today the market is dominated by crystalline silicon in multi-crystalline and mono-crystalline forms due to it being the second most abundant element on the earths crust, and its nontoxic and environmental-friendly nature compared with other materials. Development of a new process with low cost, high efficiency and environment-friendly nature to produce solar grade silicon is of significant importance for the PV industry.

First-principles study on the electronic and optical properties of the orthorhombic CsPbBr3 and CsPbI3 with Cmcm space group

2021 ◽  
Author(s):  
Xianhao Zhao ◽  
Tianyu Tang ◽  
Quan Xie ◽  
like gao ◽  
Limin Lu ◽  
...  
Keyword(s):  
Optical Properties ◽  
Solar Cells ◽  
Energy Conversion ◽  
Conversion Efficiency ◽  
First Principles ◽  
Energy Conversion Efficiency ◽  
Space Group ◽  
Absorbing Materials ◽  
Halide Perovskites ◽  
Lead Halide

The cesium lead halide perovskites are regarded as effective candidates for light-absorbing materials in solar cells, which have shown excellent performances in experiments such as promising energy conversion efficiency. In...

TiO2 cement for high-performance dye-sensitized solar cells

RSC Advances ◽  
2016 ◽  
Vol 6 (87) ◽  
pp. 83802-83807 ◽  
Author(s):  
Yu Hou ◽  
Shuang Yang ◽  
Chunzhong Li ◽  
Huijun Zhao ◽  
Hua Gui Yang
Keyword(s):  
Solar Cells ◽  
Energy Conversion ◽  
Conversion Efficiency ◽  
High Performance ◽  
Dye Sensitized Solar Cells ◽  
Energy Conversion Efficiency ◽  
Dye Sensitized ◽  
Degussa P25 ◽  
Sensitized Solar Cells

An energy conversion efficiency of 8.31% is reached by using a cemented photoanode for dye-sensitized solar cells, attaining a 31.1% improvement over the standard Degussa P25 sample.

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