Inspection Of Recombination Active Defects For Sige And Solar Cells

1996 ◽  
Vol 442 ◽  
Author(s):  
O.V. Astafiev ◽  
V.P. Kalinushkin ◽  
N.V. Abrosimov
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Light Scattering ◽  
Grain Boundary ◽  
Single Crystals ◽  
Defect Structure ◽  
Scattering Method ◽  
Recombination Activity ◽  
Cell Production ◽  
Materials Used

AbstractMapping Low Angle Light Scattering method (MLALS) is proposed to study defect structure in materials used for solar cell production. Several types of defects are observed in Czochralski Si1−xGex (0.022<x<0.047) single crystals. Recombination activity of these defects is investigated. The possibility of contactless visualisation of grain boundary recombination in polysilicon is also demonstrated.

Self-assembled propylammonium cations at grain boundaries and the film surface to improve the efficiency and stability of perovskite solar cells

2019 ◽  
Vol 7 (41) ◽  
pp. 23739-23746 ◽  
Author(s):  
Chengbin Fei ◽  
Meng Zhou ◽  
Jonathan Ogle ◽  
Detlef-M. Smilgies ◽  
Luisa Whittaker-Brooks ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Grain Boundary ◽  
Grain Boundaries ◽  
Perovskite Solar Cells ◽  
Film Surface ◽  
Solar Cell Efficiency ◽  
Cell Efficiency ◽  
Large Size ◽  
Moisture Stability

Large size cation (PA) was introduced into the grain boundary and film surface of the 3D perovskite to improve the solar cell efficiency and moisture stability.

Model-based Quantitative Assessment of Crystallinity and Parasitic Absorption in Microcrystalline Silicon Solar Cells

2012 ◽  
Vol 1426 ◽  
pp. 383-387
Author(s):  
Thomas Lanz ◽  
Corsin Battaglia ◽  
Christophe Ballif ◽  
Beat Ruhstaller
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Light Scattering ◽  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Quantitative Assessment ◽  
Silicon Solar Cells ◽  
Normalization Procedure ◽  
Microcrystalline Silicon ◽  
Scattering Model

ABSTRACTWe investigate the influence of the crystallinity of the absorber layer and parasitic absorption in the doped layers and electrodes on the external quantum efficiency and reflection of microcrystalline silicon (μc-Si:H) solar cells. Using an optical light scattering model we systematically study variations in the crystallinity and validate a simple normalization procedure that allows assessing the gains that can be achieved by reducing the parasitic absorption. The optimization potential is demonstrated with solar cell samples with increased crystallinity and eliminated parasitic absorption.

Quantifying the energy loss for the perovskite solar cell passivated by acetamidine halide

2021 ◽  
Author(s):  
Ligang Yuan ◽  
Huiming Luo ◽  
Jiarong Wang ◽  
Zonghao Xu ◽  
Jiong Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Grain Boundary ◽  
Energy Loss ◽  
Perovskite Solar Cells ◽  
Boundary Surface ◽  
Perovskite Solar Cell ◽  
Nonradiative Recombination ◽  
Surface And Interface ◽  
Recombination Centers

The defects at the grain boundary, surface and interface, acting as nonradiative recombination centers, results in considerable energy loss of perovskite solar cells (PSCs). Herein, we passivated the defects of...

Activation Energy Analysis of Dark and Laser Illuminated I-V Characteristics of Thin-Film Poly Silicon Solar Cells

2010 ◽  
Author(s):  
M. Boostandoost ◽  
U. Kerst ◽  
C. Boit
Keyword(s):  
Thin Film ◽  
Activation Energy ◽  
Solar Cells ◽  
Solar Cell ◽  
Grain Boundary ◽  
Thin Film Solar Cell ◽  
Reverse Bias ◽  
Reverse Current ◽  
Thin Film Solar Cells ◽  
Si Thin Film

Abstract The temperature dependence of photocurrent of polycrystalline Si (poly-Si) thin-film solar cells on glass with interdigitated mesa structure has been locally investigated using Infrared Light Beam Induced Current (IR-LBIC) in the temperature range of -25 to +70 °C. The temperature dependence of electrical characteristics of poly-Si thin-film solar cells in reverse bias has been also analysed and compared with the monocrystalline thin-film solar cells. The poly-Si solar cell shows a temperature coefficient (TC) for the photocurrent of around +0.8 and +0.6 %/°C in the grain interior and grain boundary, respectively. The activation energy of the reverse current and also the photocurrent due to the IR laser stimulation has been evaluated, which provide information about traps and their energy levels in the absorber layer of the poly-Si thin-film solar cell. The obtained average value of the activation energy associated with the photocurrent of the poly-Si cell suggests the existence of a shallow acceptor level at around 0.045 eV in the grain boundary and 0.062 eV in the grain interior of the absorber layer of the poly-Si thin-film solar cell. The activation energies of the reverse current for poly-Si and monocrystalline cells have been calculated when the device is biased at -1 and -2 V and the results compared with the activation energy of the saturation current obtained from extrapolation of the I-V curve in the SRH (Shockley-Read-Hall) regime. The results show strong voltage dependence. In both cases the activation energy of the reverse current decreases in the reverse bias voltage, approaching the values obtained from the photocurrent.

Extended Exciton Diffusion in Rubrene Single-Crystalline Organic Solar Cells

2012 ◽  
Vol 1390 ◽  
Author(s):  
Tetsuhiko Miyadera ◽  
Noboru Ohashi ◽  
Tetsuya Taima ◽  
Toshihiro Yamanari ◽  
Yuji Yoshida
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Film Thickness ◽  
Single Crystal ◽  
Single Crystals ◽  
Organic Solar Cells ◽  
External Quantum Efficiency ◽  
Single Crystalline ◽  
Exciton Diffusion ◽  
Sublimation Method

ABSTRACTSingle-crystalline organic solar cells were investigated. Rubrene single crystals made by train sublimation method were used for the active layer of the solar cells. Typical solar cell characteristics and external quantum efficiency (EQE) were observed with the film thickness of several micrometers. In spite of their large film thickness, the EQE spectra showed no screening effect, which means that absorbed photons efficiently converted to electric charges. This can be attributed to the extended exciton diffusion due to uniform and trap free characteristic of rubrene single crystal.

Considerably enhanced perovskite solar cells via the introduction of metallic nanostructures

2017 ◽  
Vol 5 (14) ◽  
pp. 6515-6521 ◽  
Author(s):  
Yu Cheng ◽  
Cong Chen ◽  
Xu Chen ◽  
Junjie Jin ◽  
Hao Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Light Scattering ◽  
Perovskite Solar Cells ◽  
Metallic Nanostructures ◽  
Perovskite Solar Cell ◽  
Cell Performance ◽  
Solar Cell Performance ◽  
Alloy Nanostructures ◽  
Considerable Enhancement

Metallic nanostructures are used to improve the perovskite solar cell performance by light scattering, and Au–Ag alloy nanostructures show a considerable enhancement.

Facile formation of a micro-crater structure for light scattering in quasi-solid state dye-sensitized solar cells

RSC Advances ◽  
2014 ◽  
Vol 4 (53) ◽  
pp. 28133-28139 ◽  
Author(s):  
Dae Man Han ◽  
Kwan-Woo Ko ◽  
Chi-Hwan Han ◽  
Youn Sang Kim
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Light Scattering ◽  
Solid State ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized Solar Cell ◽  
Scattering Layer ◽  
Dye Sensitized ◽  
Sensitized Solar Cells ◽  
Light Scattering Effect

The formation of a micro-crater structure with optimal morphology in a dye-sensitized solar cell (DSSC) improved the light scattering effect without an additional light scattering layer. In addition, it provided a wide entrance for a fast and complete electrolyte infiltration into the TiO2 film.

Two-Dimensional Absorbers for Solar Windows: A Simulation

2019 ◽  
Vol 74 (8) ◽  
pp. 683-688 ◽  
Author(s):  
Colleen Lattyak ◽  
Volker Steenhoff ◽  
Kai Gehrke ◽  
Martin Vehse ◽  
Carsten Agert
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Current Density ◽  
Electrical Power ◽  
Transition Metal Dichalcogenides ◽  
Good Alternative ◽  
Two Dimensional ◽  
Metal Dichalcogenides ◽  
Absorbing Layer ◽  
Materials Used

AbstractIn the future, many modern buildings may rely on solar windows for energy production. Large buildings often have glass facades that have the potential to convert sunlight to electrical power. The standard photovoltaic materials used today are bulky and not transparent, making them poor candidates for solar windows. Transition metal dichalcogenides (TMDCs) and other two-dimensional absorbers are a good alternative because of their unique properties and high transparency at the monolayer and few-layer regime. This work shows the potential for TMDC-based solar windows by simulating the transmission, quantum efficiency, current density, and colour appearance of different solar cell configurations. Different contacts were investigated, along with the influence of contact thickness, to demonstrate colour-neutral solar cells. In addition, four TMDC materials were compared: MoS2, MoSe2, WS2, and WSe2. Colour-neutral solar cells with transparencies of 35 % to 55 % are presented, where a current density of 8.33 mA/cm2 was calculated for a solar cell with a 5-nm absorbing layer of MoSe2. While there are still challenges to overcome in terms of production, our simulations show that it is possible to use TMDCs for colour-neutral solar windows and act as a guideline for further research.

Hydrogenation of Multicrystalline Si-Materials for Solar Cells: Discrimination Between Effects in the Intra-Grain and Grain Boundary Regions

1995 ◽  
Vol 378 ◽  
Author(s):  
J. Poortmans ◽  
M. Rosmeulen ◽  
A. Kaniava ◽  
J. Vanhellemont ◽  
H. Elgamel ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Grain Boundary ◽  
Impurity Content ◽  
Metallic Impurity ◽  
Rf Plasma ◽  
Small Scale ◽  
Hydrogenation Treatment

AbstractIn this paper we describe the results of a study on the hydrogenation treatment of multicrystalline substrates by an RF-plasma with emphasis on discriminating between effects on the intra-grain material and grain boundary regions. For this purpose small mesa-type diodes were processed. Two types of multicrystalline material are being compared in this study. The main difference between these materials is their oxygen and metallic impurity content. The effects of the hydrogenation treatment were studied by means of I-V and DLTS-measurements. Finally, we will present data on small multicrystalline solar cells and the effect of hydrogenation on the main parameters of this device to illustrate the correlation and the differences between the measurements on small-scale diodes and the effects on the macroscopic device which is the solar cell.

Monocrystalline Silicon Solar Cells

2021 ◽  
pp. 148-175
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Cost Effective ◽  
Substrate Material ◽  
Monocrystalline Silicon ◽  
Cell Production ◽  
Silicon Based

Monocrystalline silicon based solar cells have the attributes that includes elemental semiconductor nature and balancing properties making it extensively applicable in the field of microelectronics. Silicon based solar cells make about 90% of today’s photovoltaic technology. The highest experimental efficiency reported for monocrystalline solar cells so far is 26.6%. The V-I characteristics of monocrystalline silicon based solar cells have been deliberated in the contextual of silicon as substrate material. The theoretical value of Shockely-Queisser (SQ) limit for monocrystalline solar cells is 30% that invocate further efficiency developments. The typical monocrystalline structure and recent advancements in monocrystalline solar cells are emphasized with appropriate examples to understand the photovoltaic phenomenon. Power conversion efficiency (PCE) enhancement is of prime importance in photovoltaic industry (PV) and hence different techniques analyze the question of PCE in context of cost effective solar cell production. In light of the literature, the texturizing, anti-reflecting coating and metallization are proposed as the efficient methods for reduction in losses and enhancement in efficiency.

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