scholarly journals Optical Characterization and Photovoltaic Performance Evaluation of GaAs p-i-n Solar Cells with Various Metal Grid Spacings

Crystals ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 170 ◽  
Author(s):  
Jenq-Shinn Wu ◽  
Der-Yuh Lin ◽  
Yun-Guang Li ◽  
Hung-Pin Hsu ◽  
Ming-Cheng Kao ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Photovoltaic Performance ◽  
Optical Characterization ◽  
Induced Current ◽  
Grid Spacing ◽  
Grid Pattern ◽  
High Efficiency Solar Cells ◽  
Metal Grid ◽  
Photovoltaic Characterization

GaAs p-i-n solar cells are studied using electroreflectance (ER) spectroscopy, light beam induced current (LBIC) mapping and photovoltaic characterization. Using ER measurements, the electric field across the pn junction of a wafer can be evaluated, showing 167 kV/cm and 275 kV/cm in the built-in condition and at −3 V reverse bias, respectively. In order to understand the effect of the interval between metal grids on the device’s solar performance, we performed LBIC mapping and solar illumination on samples of different grid spacings. We found that the integrated photocurrent intensity of LBIC mapping shows a consistent trend with the solar performance of the devices with various metal grid spacings. For the wafer used in this study, the optimal grid spacing was found to be around 300 μm. Our results clearly show the importance of the metal grid pattern in achieving high-efficiency solar cells.

Optical characterization of TCO films on borate glasses for high efficiency solar cells

2012 ◽  
Author(s):  
Franziska Steudel ◽  
Paul-Tiberiu Miclea ◽  
Nico Teuscher ◽  
Andreas Heilmann ◽  
Stefan Schweizer
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Optical Characterization ◽  
Borate Glasses ◽  
High Efficiency Solar Cells

scholarly journals The dynamics of methylammonium ions in hybrid organic–inorganic perovskite solar cells

2015 ◽  
Vol 6 (1) ◽  
Author(s):  
Aurelien M. A. Leguy ◽  
Jarvist Moore Frost ◽  
Andrew P. McMahon ◽  
Victoria Garcia Sakai ◽  
W. Kockelmann ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Time Window ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Lead Iodide ◽  
High Efficiency Solar Cells ◽  
Scattering Measurements ◽  
Quasielastic Neutron ◽  
Methylammonium Lead Iodide

Abstract Methylammonium lead iodide perovskite can make high-efficiency solar cells, which also show an unexplained photocurrent hysteresis dependent on the device-poling history. Here we report quasielastic neutron scattering measurements showing that dipolar CH3NH3 + ions reorientate between the faces, corners or edges of the pseudo-cubic lattice cages in CH3NH3PbI3 crystals with a room temperature residence time of ∼14 ps. Free rotation, π-flips and ionic diffusion are ruled out within a 1–200-ps time window. Monte Carlo simulations of interacting CH3NH3 + dipoles realigning within a 3D lattice suggest that the scattering measurements may be explained by the stabilization of CH3NH3 + in either antiferroelectric or ferroelectric domains. Collective realignment of CH3NH3 + to screen a device’s built-in potential could reduce photovoltaic performance. However, we estimate the timescale for a domain wall to traverse a typical device to be ∼0.1–1 ms, faster than most observed hysteresis.

Improved photovoltaic performance in perovskite solar cells based on CH3NH3PbI3 films fabricated under controlled relative humidity

RSC Advances ◽  
2015 ◽  
Vol 5 (114) ◽  
pp. 93957-93963 ◽  
Author(s):  
Minghang Lv ◽  
Xu Dong ◽  
Xiang Fang ◽  
Bencai Lin ◽  
Shuai Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Relative Humidity ◽  
High Efficiency ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Hybrid Perovskite ◽  
High Efficiency Solar Cells

The relative humidity and solvent is demonstrated for the controlled ambient crystallization of dense uniform hybrid-perovskite films for high-efficiency solar cells.

Enhanced up-converted fluorescence in fluorozirconate based glass ceramics for high efficiency solar cells

2008 ◽  
Author(s):  
Bernd Ahrens ◽  
Bastian Henke ◽  
Paul T. Miclea ◽  
Jacqueline A. Johnson ◽  
Stefan Schweizer
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Glass Ceramics ◽  
High Efficiency Solar Cells

Improvement in Wide-Gap A-SI:H For High-Efficiency Solar Cells

1992 ◽  
Vol 258 ◽  
Author(s):  
Sadaji Tsuge ◽  
Yoshihiro Hishikawa ◽  
Shingo Okamoto ◽  
Manabu Sasaki ◽  
Shinya Tsuda ◽  
...  
Keyword(s):  
Solar Cells ◽  
Plasma Treatment ◽  
High Efficiency ◽  
Defect Density ◽  
Hydrogen Plasma ◽  
Wide Band ◽  
Open Circuit ◽  
Wide Band Gap ◽  
High Efficiency Solar Cells ◽  
Wide Gap

ABSTRACTA hydrogen-plasma treatment has been used for the first time to fabricate wide-gap, high-quality a-Si:H films. The hydrogen content (CH) of a-Si:H films substantially increases by the hydrogen-plasma treatment after deposition, without deteriorating the opto-electric properties of the films. The photoconductivity (σph) of ≥ 10-5 ο-1 cm-1, photosensitivity ( σ ph/σ d) of > 106 and SiH2/SiH of <0.2 are achieved for a film with CH of ∼25 atomic >%. The optical gap of the film is > 1.70 eV by the (α h ν )1/3 plot, and is >2 eV by the Tauc's plot. The open circuit voltage of a-Si solar cells exceeds 1 V conserving the fill factor of > 0.7 when the wide-gap a∼Si:H films are used as the i-layer, which proves the wide band gap and low defect density.

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