Journal ArticleDOI
Band Offset Reduction at Defect-Rich p/i Interface Through a Wide Bandgap a-SiO:H Buffer Layer
Reads0
Chats0
TLDR
In this paper, a simulation and experimental study on the performance of p-i-n solar cells by inserting the intrinsic hydrogenated amorphous silicon oxide (i-a-SiO:H) buffer layer at the p/i interface is reported.Abstract:
In single junction p-i-n solar cells, the optical losses can be mitigated by inserting the wide band gap amorphous silicon oxide layer at the defect-rich p/i interface. In this paper, a simulation and experimental study on the performance of p-i-n solar cells by inserting the intrinsic hydrogenated amorphous silicon oxide (i-a-SiO:H) buffer layer at the p/i interface is reported. The i-a-SiO:H film has been deposited by radio-frequency plasma-enhanced chemical vapor deposition (RF-PECVD) (13.6 MHz) at a low substrate temperature of approximately 230°C. The p/i interface is crucial to solar cell performance because the first few nanometers of the intrinsic layer are a defect-rich layer, having the band gap discontinuity, resulting in band offset. Thus, the carrier recombination probability increases in the vicinity of p/i interface because of high defect density and short carrier lifetime. Aided by optically calibrated simulations and with the support of experimental results, this study shows that a wide band gap thin undoped a-SiO:H buffer layer with higher photoconductivity reduces the band-gap offset and minimizes the recombination of photogenerated charge carriers at the defect-rich p/i interface. It has also been found that the a-SiO:H buffer layer augmented the electric field inside the device. As a result, the overall performance of the a-Si:H-based single junction solar cell has significantly improved. By employing a ∼5 nm thick a-SiO:H buffer layer, the blue response of the cell has been improved, resulting in 7.34% and 18.62% enhancement in fill factor (FF) and power conversion efficiency ( η ), respectively, as compared to the buffer-less cell.read more
Citations
More filters
Journal ArticleDOI
Charge Transport Layer-Dependent Electronic Band Bendingin Perovskite Solar Cells and Its Correlation to Light-Induced DeviceDegradation
TL;DR: In this article, the stability issue of perovskite solar cells has been investigated and the working principle remains under debate, and the stability issues has not been solved yet, however, their working principle has been shown to achieve power-conversion efficiency of 25.2%.
Journal ArticleDOI
Design and Simulation of a-Si:H/PbS Colloidal Quantum Dots Monolithic Tandem Solar Cell for 12% Efficiency
Journal ArticleDOI
Carrier‐Selective Contact Based Silicon Solar Cells Processed at Room Temperature using Industrially Feasible Cz Wafers
Journal ArticleDOI
Application of Hybrid rGO-ITO Bilayer TCO on a-Si Solar Cell for Performance Enhancement
Anupam Nandi,Sourav Mandal,Sugato Ghosh,Sukanta Dhar,Sanhita Majumdar,Hiranmay Saha,Syed Minhaz Hossain +6 more
TL;DR: Amine-functionalized reduced graphene oxide (af-rGO) has been synthesized wet-chemically by modified Hummer's method in this paper, and colloids with different densities have been coated on a baseline amorphous silicon (a-Si:H) solar cell and the respective optical and solar performances have been compared with the baseline solar cell to optimize the suitable density, which is further validated by investigating the respective field emission scanning electron microscope (FESEM) micrograph of the surface area coverage by rGO on the top of the indium tin oxide (
Posted Content
Structural Studies on Semiconducting Hydrogenated Amorphous Silicon Oxide Films
TL;DR: In this article, a systematic study was carried out to correlate the optoelectronic property with local atomic arrangement, and the authors found that the stretching vibration of-OH bonded to Si gives rise to 780 cm-1 absorption band.
References
More filters
Journal ArticleDOI
Statistics of the Recombinations of Holes and Electrons
William Shockley,W. T. Read +1 more
TL;DR: In this article, the statistics of the recombination of holes and electrons in semiconductors were analyzed on the basis of a model in which the recombinations occurred through the mechanism of trapping.
Journal ArticleDOI
Parameterization of the optical functions of amorphous materials in the interband region
TL;DR: Forouhi and Bloomer as mentioned in this paper presented a parameterization of the optical functions of amorphous semiconductors and insulators in which the imaginary part of the dielectric function e2 is determined by multiplying the Tauc joint density of states by the e2 obtained from the Lorentz oscillator model.
Book
Spectroscopic Ellipsometry: Principles and Applications
TL;DR: In this paper, the authors present an overview of the application of Spectroscopic Ellipsometry in real-time monitoring of thin-film growth and its application in real time monitoring of anisotropic materials.
Journal ArticleDOI
Nonequilibrium Steady-State Statistics and Associated Effects for Insulators and Semiconductors Containing an Arbitrary Distribution of Traps
J. G. Simmons,G. W. Taylor +1 more
TL;DR: In this article, the authors derived the statistics for an arbitrary distribution of traps under nonequilibrium steady-state conditions, and it was seen to be identical in form to the Shockley-Read expression for a single trapping level.
Book
Amorphous and Microcrystalline Silicon Solar Cells: Modeling, Materials and Device Technology
Ruud E. I. Schropp,Miro Zeman +1 more
TL;DR: The technology of amorphous and microcrystalline silicon solar cells has been studied in this paper, where the authors present an overview of the properties of solar cells and their properties in terms of optical, electronic and structural properties.
Related Papers (5)
Effect of incorporating p-type hydrogenated nanocrystalline silicon buffer layer on amorphous silicon n-i-p solar cell performances
A. Belfar,H. Aït-Kaci +1 more