scholarly journals Effect of the lattice mismatch on the efficiency of the GaAs nanowire/Si substrate solar cell

2021 ◽  
Vol 2015 (1) ◽  
pp. 012004
Author(s):  
P A Alekseev ◽  
V A Sharov ◽  
B R Borodin ◽  
M S Dunaevskiy ◽  
R R Reznik ◽  
...  
Keyword(s):  
Solar Cell ◽  
Lattice Mismatch ◽  
Si Substrate ◽  
Conductive Atomic Force Microscopy ◽  
Crystal Lattices ◽  
Zinc Blend ◽  
Solar Cell Efficiency ◽  
Cell Efficiency ◽  
Piezoelectric Effects ◽  
Gaas Nanowire

Abstract The effect of the crystal lattice mismatch between single p-GaAs nanowire grown on p-Si substrate on the solar cell efficiency is studied. The study is performed by measuring the I-V curves under red (wavelength=650 nm) laser illumination. The measurement of the single nanowire was done by conductive atomic force microscopy (C-AFM). The measured curve was reproduced by numerical simulations accounting piezoresistance and piezoelectric effects. The analysis demonstrated the presence of the tensile (2%) zinc blend insert at the interface between nanowire and substrate induced by crystal lattices mismatch. Strained insert at the interface changes the polarity of the photogenerated current and increases the efficiency by 2 times.

scholarly journals Effect of the Uniaxial Compression on the GaAs Nanowire Solar Cell

Micromachines ◽  
2020 ◽  
Vol 11 (6) ◽  
pp. 581 ◽  
Author(s):  
Prokhor A. Alekseev ◽  
Vladislav A. Sharov ◽  
Bogdan R. Borodin ◽  
Mikhail S. Dunaevskiy ◽  
Rodion R. Reznik ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Numerical Simulations ◽  
Uniaxial Compression ◽  
Mechanical Deformation ◽  
Conductive Atomic Force Microscopy ◽  
Solar Cell Efficiency ◽  
Cell Efficiency ◽  
Piezoelectric Effects ◽  
Gaas Nanowire

Research regarding ways to increase solar cell efficiency is in high demand. Mechanical deformation of a nanowire (NW) solar cell can improve its efficiency. Here, the effect of uniaxial compression on GaAs nanowire solar cells was studied via conductive atomic force microscopy (C-AFM) supported by numerical simulation. C-AFM I–V curves were measured for wurtzite p-GaAs NW grown on p-Si substrate. Numerical simulations were performed considering piezoresistance and piezoelectric effects. Solar cell efficiency reduction of 50% under a −0.5% strain was observed. The analysis demonstrated the presence of an additional fixed electrical charge at the NW/substrate interface, which was induced due to mismatch between the crystal lattices, thereby affecting the efficiency. Additionally, numerical simulations regarding the p-n GaAs NW solar cell under uniaxial compression were performed, showing that solar efficiency could be controlled by mechanical deformation and configuration of the wurtzite and zinc blende p-n segments in the NW. The relative solar efficiency was shown to be increased by 6.3% under −0.75% uniaxial compression. These findings demonstrate a way to increase efficiency of GaAs NW-based solar cells via uniaxial mechanical compression.

Methods of Ga droplet consumption for improved GaAs nanowire solar cell efficiency

2016 ◽  
Vol 27 (47) ◽  
pp. 475403 ◽  
Author(s):  
M H T Dastjerdi ◽  
J P Boulanger ◽  
P Kuyanov ◽  
M Aagesen ◽  
R R LaPierre
Keyword(s):  
Solar Cell ◽  
Solar Cell Efficiency ◽  
Cell Efficiency ◽  
Gaas Nanowire

Optimization of GaAs nanowire solar cell efficiency via optoelectronic modeling

2015 ◽  
Author(s):  
Anna H. Trojnar ◽  
Christopher E. Valdivia ◽  
Khalifa M. Azizur-Rahman ◽  
Ray R. LaPierre ◽  
Karin Hinzer ◽  
...  
Keyword(s):  
Solar Cell ◽  
Solar Cell Efficiency ◽  
Cell Efficiency ◽  
Gaas Nanowire

Combined Effects of Pyramid-Like Structures and Antireflection Coating on Si Solar Cell Efficiency

2015 ◽  
Vol 15 (10) ◽  
pp. 7624-7631 ◽  
Author(s):  
Chanseob Cho ◽  
Junghwa Oh ◽  
Byeungleul Lee ◽  
Bonghwan Kim
Keyword(s):  
Solar Cell ◽  
Thermal Annealing ◽  
Carrier Lifetime ◽  
Minority Carrier ◽  
Minority Carrier Lifetime ◽  
Antireflection Coating ◽  
Si Substrate ◽  
Solar Cell Efficiency ◽  
Cell Efficiency ◽  
Uniform Doping

We developed a novel process for synthesizing Si solar cells with improved efficiencies. The process involved the formation of pyramid-like structures on the Si substrate and the deposition and subsequent thermal annealing of an antireflection coating. The process consisted of three main stages. First, pyramid-like structures were textured on the Si substrate by reactive ion etching and subsequently etched using a mixture of HF, HNO3, and deionized water for 300 s. Next, an antireflection coating was deposited on the substrate and was subsequently thermally annealed in a furnace in a N2 atmosphere. After the annealing process, the minority carrier lifetime increased by approximately 40 μs. Further, because of the increase in the minority carrier lifetime and the uniform doping of the substrate, the leakage current decreased. As a result, the efficiency of resulting solar cell increased to 17.24%, in contrast to that of the reference cell, which was only 15.89%. Thus, uniform doping and the thermal annealing of the antireflective coating improved solar cell efficiency.

Experimental and Theoretical Comparable Study of Pure and Zinc Porphyrin Surface Modified ZnO Nanorod Arrays for Hybrid Solar Cell Applications

2020 ◽  
pp. 114-119
Keyword(s):  
Solar Cell ◽  
Electrochemical Impedance ◽  
Hybrid Solar Cell ◽  
Cell Performance ◽  
Solar Cell Performance ◽  
Solar Cell Efficiency ◽  
Cell Efficiency ◽  
Annealing Effects ◽  
Vertically Aligned ◽  
Surface Modified

Experimental and theoretical study Porphyrin-grafted ZnO nanowire arrays were investigated for organic/inorganic hybrid solar cell applications. Two types of porphyrin – Tetra (4-carboxyphenyle) TCPP and meso-Tetraphenylporphine (Zinc-TPP)were used to modify the nanowire surfaces. The vertically aligned nanowires with porphyrin modifications were embedded in graphene-enriched poly (3-hexylthiophene) [G-P3HT] for p-n junction nanowire solar cells. Surface grafting of ZnO nanowires was found to improve the solar cell efficiency. There are different effect for the two types of porphyrin as results of Zn existing. Annealing effects on the solar cell performance were investigated by heating the devices up to 225 °C in air. It was found that the cell performance was significantly degraded after annealing. The degradation was attributed to the polymer structural change at high temperature as evidenced by electrochemical impedance spectroscopy measurements.

Solar cell efficiency tables (Version 58)

2021 ◽  
Author(s):  
Martin A. Green ◽  
Ewan D. Dunlop ◽  
Jochen Hohl‐Ebinger ◽  
Masahiro Yoshita ◽  
Nikos Kopidakis ◽  
...  
Keyword(s):  
Solar Cell ◽  
Solar Cell Efficiency ◽  
Cell Efficiency

scholarly journals CdTe-Based Thin Film Solar Cells: Past, Present and Future

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1684
Author(s):  
Alessandro Romeo ◽  
Elisa Artegiani
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Solar Cell ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Open Circuit ◽  
Early Years ◽  
Solar Cell Efficiency ◽  
Cell Efficiency

CdTe is a very robust and chemically stable material and for this reason its related solar cell thin film photovoltaic technology is now the only thin film technology in the first 10 top producers in the world. CdTe has an optimum band gap for the Schockley-Queisser limit and could deliver very high efficiencies as single junction device of more than 32%, with an open circuit voltage of 1 V and a short circuit current density exceeding 30 mA/cm2. CdTe solar cells were introduced at the beginning of the 70s and they have been studied and implemented particularly in the last 30 years. The strong improvement in efficiency in the last 5 years was obtained by a new redesign of the CdTe solar cell device reaching a single solar cell efficiency of 22.1% and a module efficiency of 19%. In this paper we describe the fabrication process following the history of the solar cell as it was developed in the early years up to the latest development and changes. Moreover the paper also presents future possible alternative absorbers and discusses the only apparently controversial environmental impacts of this fantastic technology.

Sign in / Sign up

Export Citation Format

Share Document