Ultra-thin LiF Layer As The Electron Collector For a-Si:H Based Photovoltaic Cell

MRS Advances ◽  
2017 ◽  
Vol 2 (15) ◽  
pp. 863-867 ◽  
Author(s):  
Erenn Ore ◽  
Jimmy Melskens ◽  
Arno Smets ◽  
Miro Zeman ◽  
Gehan Amaratunga
Keyword(s):  
Fill Factor ◽  
Photovoltaic Cell ◽  
Standard Test ◽  
Single Junction ◽  
Boron Doped ◽  
Front Electrode ◽  
Test Conditions ◽  
Current Voltage ◽  
Spectrum Region ◽  
Short Current Density

ABSTRACTAn ultra-thin LiF layer in conjunction with an Al layer is employed as the electron collector for the a-Si:H based single-junction thin film photovoltaic cell. The cell has the structure of boron doped μ-SiOx (hole collector) - intrinsic a-Si:H (photoactive layer) - LiF / Al (electron collector and back electrode). The substrate used is U type Asahi glass, which is also acting as the transparent front electrode. For the cell with the 1.5 nm thick LiF layer, annealed at 120°C, the open current voltage (VOC) of 0.936 V, the short current density (JSC) of 13.598 mA/cm2, and the fill factor (FF) of 0.690 are achieved. The JSC and VOC values are comparable to the values measured for the a-Si:H based p-i-n reference cell, but the FF value is found to be lower, which is attributed to the losses due to recombination at the intrinsic a-Si:H / LiF / Al junction. The current versus voltage measurements are carried out under the standard test conditions. The JSC values are corrected according to the external quantum efficiency measurements of the cells in the AM1.5 spectrum region between 270 nm and 800 nm.

MoOx Hole Collection Layer for a-Si:H Based Photovoltaic Cells

MRS Advances ◽  
2016 ◽  
Vol 1 (14) ◽  
pp. 977-983 ◽  
Author(s):  
Erenn Ore ◽  
Jimmy Melskens ◽  
Arno Smets ◽  
Miro Zeman ◽  
Gehan Amaratunga
Keyword(s):  
Green Light ◽  
Photovoltaic Cell ◽  
Photoactive Layer ◽  
Boron Doped ◽  
Electron Collection ◽  
Light Region ◽  
Current Voltage ◽  
Glass Type ◽  
Spectrum Region ◽  
Short Current Density

ABSTRACTAn experimental investigation to verify the suitability of MoOx as the hole collection layer for a-Si:H based thin film photovoltaic cell is carried out. The photovoltaic cell investigated has the structure of MoOx (hole collection layer) / intrinsic a-Si:H (photoactive layer) / phosphorus doped a-Si:H (electron collection layer) / Ag (back reflector electrode); all deposited in that order onto an Asahi glass (type U) substrate, which is also acting as the transparent front electrode for the cell. The effects of different post deposition annealing temperatures are investigated. The highest efficiency values are obtained for the cells annealed at 120°C. For the photovoltaic cell with 100 nm thick photoactive layer, the highest efficiency is measured to be 6.46 % with an open current voltage (Voc) of 827 mV and a short current density of (Jsc) of 10.44 mA/cm2. For the photovoltaic cell with 300 nm thick photoactive layer, the highest efficiency is measured to be 7.93 % with Voc of 818 mV and Jsc of 13.24 mA/cm2. The efficiency measurements are carried out under AM1.5 test conditions. Jsc values are corrected according to the external quantum efficiency measurements of the cells in the AM1.5 photovoltaic spectrum region between 270 nm and 800 nm. Compared to the reference cell with boron doped μ-SiOx layer acting as the hole collection layer, the cell with MoOx hole collection layer has similar FF, lower Voc, higher Jsc for wavelength up to the green light region of the AM1.5 spectrum and lower Jsc for the longer wavelengths.

Standard Characterization of Multi-junction Thin-film Photovoltaic Modules: Spectral Mismatch Correction to Standard Test Conditions and Comparison with Outdoor Measurements

2010 ◽  
Vol 1245 ◽  
Author(s):  
Mauro Pravettoni ◽  
Georgios Tzamalis ◽  
Komlan Anika ◽  
Davide Polverini ◽  
Harald Müllejans
Keyword(s):  
Thin Film ◽  
Spectral Response ◽  
Standard Test ◽  
Large Area ◽  
Response Measurement ◽  
Test Conditions ◽  
Current Voltage ◽  
Long Term Performance ◽  
Term Performance

AbstractMulti-junction thin-film devices have emerged as very promising PV materials due to reduced cost, manufacturing ease, efficiency and long term performance. The consequent growing interest of the PV community has lead to the development of new methods for the correction of indoor measurements to standard test conditions (STC), as presented in this paper. The experimental setup for spectral response measurement of multi-junction large-area thin-film modules is presented. A method for reliable corrections of indoor current-voltage characterization to STC is presented: results are compared with outdoor measurements where irradiance conditions are close to standard ones, highlighting ongoing challenges in standard characterization of such devices.

scholarly journals New kind of Cu based paste for Si solar cells front contact formation

2018 ◽  
Vol 36 (3) ◽  
pp. 469-476 ◽  
Author(s):  
Małgorzata Musztyfaga-Staszuk ◽  
Łukasz Major ◽  
Grzegorz Putynkowski ◽  
Anna Sypień ◽  
Katarzyna Gawlińska ◽  
...  
Keyword(s):  
Solar Cells ◽  
Fill Factor ◽  
Crystalline Silicon ◽  
Electrical Parameters ◽  
Transmission Microscopy ◽  
Crystalline Silicon Solar Cells ◽  
Front Electrode ◽  
Current Voltage ◽  
Potential Impact ◽  
Dupont Company

AbstractPotential impact of copper replacing silver in the paste used for the front electrode fabrication in crystalline silicon solar cells was investigated. The copper was applied as a new CuXX component with about 2 wt.% to 6 wt.% share of XX modifier. The generated CuXX molecules were analyzed using transmission microscopy. Based on the commercial Du Pont PV19B paste, CuXX and XX materials, the new PV19B/CuXX paste with 51 wt.% share of Cu and the PV19B/XX paste with 51 wt.% share of XX only were developed. Comparative studies of the effect of the commercial PV19B paste made by DuPont Company, and the pastes with the CuXX component and with the modifier XX alone on the electrical parameters of solar cells produced on crystalline silicon were carried out. The solar cells were characterized by the current-voltage technique. As a final result, the Cz-Si solar cell with the 51 wt.% share of Cu in the front electrode having a series resistance of 0.551 Ω·cm2, an efficiency of 14.08 % and, what is more important, the fill factor of 0.716, was obtained. It is the best result ever obtained concerning direct Cu application for solar cells fabricated in thick-film technology.

scholarly journals Optimization of Silicon solar cell in MATLAB/SIMULINK for improved efficiency

2013 ◽  
Vol 5 (3) ◽  
pp. 576-585
Author(s):  
Rutvi Rohit Panchal ◽  
Lochan Jolly
Keyword(s):  
Solar Cell ◽  
Solar Energy ◽  
Silicon Solar Cell ◽  
Fill Factor ◽  
Standard Test ◽  
Energy Sources ◽  
Simulink Model ◽  
Test Conditions ◽  
Main Challenge ◽  
The Comparative Study

Solar energy is an important part of life and has been in use since the beginning of time. Increasingly, man is learning how to yoke this important resource and use it to replace traditional energy sources. Solar cells are the development to store the solar energy and reproduce electricity. But the amount of energy converted is very less, that is the efficiency of conversion is poor. The main challenge is to improve the efficiency so that the losses can be minimized. The Maximum Power Points are found and the Fill Factor is calculated.  The comparative study of silicon solar cell and panels with different sizes is done in this paper using MATLAB and SIMULINK model. The simulated results are compared with practically tested solar cell at Standard Test Conditions (STC).

scholarly journals Effect of Measurement Factors on Photovoltaic Cell Parameters Extracting

2017 ◽  
Vol 7 (1) ◽  
pp. 50 ◽  
Author(s):  
El Hadi Chahid ◽  
Mohammed Idali Oumhand ◽  
M’barek Feddaoui ◽  
Mohammed Erritali ◽  
Abdessamad Malaoui
Keyword(s):  
Series Resistance ◽  
Photovoltaic Cells ◽  
Photovoltaic Cell ◽  
Standard Test ◽  
External Factors ◽  
Saturation Current ◽  
Shunt Resistance ◽  
Cell Parameters ◽  
Current Voltage ◽  
Measurement Results

In this paper, we study the influence of external factors on the measurement for the current–voltage (I-V) characteristic of the photovoltaic cell. These factors are the size of the number of measurements, the range of the cell generated voltage and the influence of measures step and mode combination of photovoltaic cells (parallel, serial, or hybrid). The main extracted parameters solar cell are the photocurrent Iph, the reverse diode saturation current I0, the ideality factor of diode n, the series resistance Rs and the shunt resistance Rsh. A method for finding these parameters, according to the single-diode model, was developed by Newton-Raphson’s method using Matlab. To assess the accuracy of this method, measured and calculated I–V characteristics were compared with provided data by the manufacturer at standard test condition (STC). The measurement results showed that these parameters are highly dependent on these four factors.

scholarly journals Analysis of Power Generation for Solar Photovoltaic Module with Various Internal Cell Spacing

2021 ◽  
Vol 13 (11) ◽  
pp. 6364
Author(s):  
June Raymond L. Mariano ◽  
Yun-Chuan Lin ◽  
Mingyu Liao ◽  
Herchang Ay
Keyword(s):  
Power Output ◽  
Spacing Effect ◽  
Photovoltaic Cell ◽  
Standard Test ◽  
Photovoltaic Module ◽  
Solar Pv ◽  
Engineering Software ◽  
Internal Cell ◽  
Cell Spacing ◽  
Pv Module

Photovoltaic (PV) systems directly convert solar energy into electricity and researchers are taking into consideration the design of photovoltaic cell interconnections to form a photovoltaic module that maximizes solar irradiance. The purpose of this study is to evaluate the cell spacing effect of light diffusion on output power. In this work, the light absorption of solar PV cells in a module with three different cell spacings was studied. An optical engineering software program was used to analyze the reflecting light on the backsheet of the solar PV module towards the solar cell with varied internal cell spacing of 2 mm, 5 mm, and 8 mm. Then, assessments were performed under standard test conditions to investigate the power output of the PV modules. The results of the study show that the module with an internal cell spacing of 8 mm generated more power than 5 mm and 2 mm. Conversely, internal cell spacing from 2 mm to 5 mm revealed a greater increase of power output on the solar PV module compared to 5 mm to 8 mm. Furthermore, based on the simulation and experiment, internal cell spacing variation showed that the power output of a solar PV module can increase its potential to produce more power from the diffuse reflectance of light.

Solar Cell Manufacturing Method with the Structure of the Bulk Heterojunction Based on Organic Semiconductors with a Direct Architecture

2016 ◽  
Vol 845 ◽  
pp. 224-227 ◽  
Author(s):  
Danila Saranin ◽  
Marina Orlova ◽  
Sergey Didenko ◽  
Oleg Rabinovich ◽  
Andrey Kryukov
Keyword(s):  
Solar Cells ◽  
Organic Semiconductors ◽  
Organic Solar Cells ◽  
Fill Factor ◽  
Research Output ◽  
Bulk Heterojunction ◽  
Organic Basis ◽  
Manufacturing Method ◽  
Current Voltage ◽  
Current Voltage Characteristics

This article presents the results of research output voltage characteristics of solar cells on an organic basis with the use of P3HT: PCBM system. There were produced organic solar cells in a coating in air, current-voltage characteristics were measured. It was determined the characteristic influence of a substrate cleaning and annealing temperature of layers applied on fill factor and conversion efficiency.

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