Explanipedia

Photovoltaic cable jackets A comparison of representative products using combined-accelerated stress testing Open

David C. Miller, Rachael L. Arnold, Peter Hacke, Aubrey Jackson, Chun‐Sheng Jiang , et al. · 2025

Photovoltaic Cable Jackets: A Comparison of Representative Products Using Combined-Accelerated Stress Testing [Slides] Open

David C. Miller, Rachael L. Arnold, Peter Hacke, Aubrey Jackson, C.-S. Jiang , et al. · 2024

Photovoltaic (PV) cables facilitate the distribution of electricity collected from modules to the energy grid. Durable cabling enables continuous operation of PV installations, whereas cables with a lifetime less than the modules must be r…

Soiling, cleaning, and abrasion: The results of the 5-year photovoltaic glass coating field study Open

Joanna Bomber, Asher Einhorn, Chaiwat Engtrakul, Clare Lanaghan, Jeffrey Linger , et al. · 2024

"Soiling, Cleaning, and Abrasion: The Results of the Five-Year Photovoltaic Glass Coating Field Study" [Slides] Open

Joanna Bomber, Asher Einhorn, Chaiwat Engtrakul, Clare Lanaghan, Jeffrey Linger , et al. · 2024

External contamination ("soiling") of the incident surface is a major limiting factor for solar technologies. A 5-year field glass coupon study was conducted to better understand external contamination and its effects; compare cleaning met…

Photovoltaic Cable Connectors: A Comparative Assessment of the Present State of the Industry [Slides] Open

David C. Miller, Rachael L. Arnold, Peter Hacke, Chun‐Sheng Jiang, Steven C. Hayden , et al. · 2024

The consequences of failure for balance of systems (BoS) components (such as PV cable connectors) include offline module string(s); low system voltage; arc, ground, insulation, and over-temperature faults; triggered fuse(s); system shutdow…

Soiling, Cleaning, and Abrasion: The Results of the 5-Year Photovoltaic Glass Coating Field Study Open

David C. Miller, Joanna Bomber, Asher Einhorn, Chaiwat Engtrakul, Clare Lanaghan , et al. · 2024

Accelerated Aging of PV Cables - The Development of Methods Towards Combined-Accelerated Stress Testing Open

David C. Miller, Rachael L. Arnold, Peter Hacke, Chun‐Sheng Jiang, Helio Moutinho , et al. · 2023

PV cables allow the collection and distribution of electricity from modules to the energy grid. Durable cabling allows continuous operation of PV installations. Cables with a life less than that of the modules must be replaced - reducing e…

Degradation-related defect level in weathered silicon heterojunction modules characterized by deep level transient spectroscopy Open

Steve Johnston, Dirk Jordan, Dana B. Kern, Dylan J. Colvin, Kristopher O. Davis , et al. · 2023

Multimodal microscopy of extended defects in β-Ga2O3 (010) EFG crystals Open

Drew T. Haven, Helio Moutinho, John S. Mangum, Harvey Guthrey, D. E. Joyce , et al. · 2023

Beta-phase gallium oxide (β-Ga2O3) has attracted attention in recent years as a potentially low cost, large area substrate and active layer material for high power, high temperature power electronics and sensing devices. However, growth of…

Molecular Beam Epitaxy of Monocrystalline GaAs on Water-Soluble NaCl Thin Films Open

Brelon J. May, Jae Hoon Kim, Evan G. Wong, Patrick Walker, William McMahon , et al. · 2023

The goal of this project was to demonstrate the feasibility of employing an epitaxial NaCl thin film as a water-soluble release layer for III-V photovoltaic devices and GaAs substrate reuse. Over the course of this project efforts were foc…

Methods of growing CdTe-based materials at high rates Open

James M. Burst, David S. Albin, Eric Colegrove, Matthew O. Reese, Helio Moutinho , et al. · 2023

Systems and methods for growing high-quality CdTe-based materials at high growth rates are provided. According to an aspect of the invention, a method includes depositing a first CdTe-based layer on a CdTe-based template at a rate of great…

Degradation-Related Defect Level in Weathered Silicon Heterojunction Modules Characterized by Deep Level Transient Spectroscopy Open

Steve Johnson, Dirk Jordan, Dana B. Kern, Dylan J. Colvin, Kristopher O. Davis , et al. · 2023

Nanometer-Scale Measurement of Grid Finger Electrical Conduction Pathways to Detect Series Resistance Degradation of Utility-Scale Silicon Solar Cells Open

Chun‐Sheng Jiang, Steve Johnston, E. Ashley Gaulding, Michael G. Deceglie, Robert Flottemesch , et al. · 2022

Here, we report on an electrical conduction mechanism for series resistance (Rs) degradation observed in a utility-scale photovoltaic power plant by imaging the local resistance at the Ag/Si interface of the c-Si front metallization. Scann…

Microscopy Visualization of Carrier Transport in CdSeTe/CdTe Solar Cells Open

Chuanxiao Xiao, Chun‐Sheng Jiang, Marco Nardone, David S. Albin, Adam Danielson , et al. · 2022

Solar cells are essentially minority carrier devices, and it is therefore of central importance to understand the pertinent carrier transport processes. Here, we advanced a transport imaging technique to directly visualize the charge motio…

Investigating the Role of Copper in Arsenic Doped CdSeTe Photovoltaic Devices Open

Eric Colegrove, Matthew O. Reese, David S. Albin, Joel N. Duenow, Brian Good , et al. · 2022

As part of NREL's development of arsenic doped CdSeTe devices, co-doping with copper has become a common practice and, despite little difference in carrier concentration (often ~1016 cm-3), co-doped devices regularly show improved Voc. Giv…

Consideration of the Intricacies Inherent in Molecular Beam Epitaxy of the NaCl/GaAs System Open

Brelon J. May, Jae Jin Kim, Patrick Walker, William E. McMahon, Helio Moutinho , et al. · 2022

The high cost of substrates for III-V growth can be cost limiting for technologies that require large semiconductor areas. Thus, being able to separate device layers and reuse the original substrate is highly desirable, but existing techni…

Molecular beam epitaxy of GaAs templates on water soluble NaCl thin films Open

Brelon J. May, Jae Jin Kim, Patrick Walker, Helio Moutinho, William E. McMahon , et al. · 2022

Differences in Printed Contacts Lead to Susceptibility of Silicon Cells to Series Resistance Degradation Open

E. Ashley Gaulding, John S. Mangum, Steve Johnston, Chun‐Sheng Jiang, Helio Moutinho , et al. · 2022

Here, in this case study, we investigate a degradation mode occurring at the cell level in fielded multi-Si modules. The modules exhibit a mix of affected and unaffected cells. Affected cells show a progressive, series-resistance-related p…

Consideration of the Intricacies Inherent in Molecular Beam Epitaxy of the NaCl/GaAs System Open

Brelon J. May, Jae Jin Kim, Patrick Walker, William E. McMahon, Helio Moutinho , et al. · 2022

The high cost of substrates for III-V growth can be cost limiting for technologies that require large semiconductor areas. Thus, being able to separate device layers and reuse the original substrate is highly desirable, but existing techni…

Investigating the Role of Copper in Arsenic Doped Cd(Se,Te) Photovoltaics Open

Eric Colegrove, Brian Good, Ali Abbas, Helio Moutinho, Steve Johnson , et al. · 2022

Potential-induced degradation of Cu(In,Ga)Se2 can occur by shunting the front i-ZnO and by damaging the p-n junction Open

Christopher P. Muzzillo, Kent Terwilliger, Peter Hacke, Helio Moutinho, Matthew Young , et al. · 2022

High Efficiency Silicon Module Degradation - From Atoms to Systems: Preprint Open

Dirk Jordan, Dana B. Kern, Steve Johnston, Helio Moutinho, Chuanxiao Xiao , et al. · 2021

For PV to be cost competitive with traditional energy sources reliability is of critical importance. Historically, PV reliability has focused on the module packaging because degradation and failure modes were directly linked to the packagi…

Application of electron backscatter diffraction techniques to quantify effects of aging on sub-grain and spatial heterogeneity in NMC cathodes Open

Kae Fink, Drew Joseph Pereira, Helio Moutinho, Patrick Walker, Joshua Major , et al. · 2021

Colossal grain growth in Cd(Se,Te) thin films and their subsequent use in CdTe epitaxy by close-spaced sublimation Open

David S. Albin, Mahisha Amarasinghe, Matthew O. Reese, John Moseley, Helio Moutinho , et al. · 2020

Many technologies deposit thin films on inexpensive substrates, resulting in small grains due to classic nucleation and grain growth theory. For example, state-of-the-art solar cells are made by depositing CdSeTe and CdTe layers on inexpen…

Direct Microscopy Imaging of Nonuniform Carrier Transport in Polycrystalline Cadmium Telluride Open

Chuanxiao Xiao, Chun‐Sheng Jiang, Kevin Blaine, Mahisha Amarasinghe, Eric Colegrove , et al. · 2020

Se diffusion in CdTe thin films for photovoltaics Open

Eric Colegrove, Xin Zheng, Tursun Ablekim, Joel N. Duenow, Craig L. Perkins , et al. · 2020

Manipulating CdSeTe bandgrading to enhance photocurrent and carrier lifetime is an essential part of high-performance CdTe photovoltaics (PVs). In this work, we examine Se diffusion kinetics in single-crystal and polycrystalline CdTe durin…

Electron Backscatter Diffraction for Investigating Lithium-Ion Electrode Particle Architectures Open

Alexander Quinn, Helio Moutinho, Francois L. E. Usseglio‐Viretta, Ankit Verma, Kandler Smith , et al. · 2020

Local Resistance Measurement for Degradation of c-Si Heterojunction with Intrinsic Thin Layer (HIT) Solar Modules Open

Chun‐Sheng Jiang, Dana B. Kern, Helio Moutinho, Dirk Jordan, Chuanxiao Xiao , et al. · 2020

Crystalline silicon (C-Si) heterojunction with intrinsic thin layer (HIT) technology is one of highest efficiency C-Si-based solar cell, and has been deployed in solar farm in large scales for over 10 years. HIT modules degrade in a typica…

Investigation of SHJ Module Degradation: A Post- Mortem Approach Open

Simon M.F. Zhang, Dana B. Kern, Robert Lee Chin, Michael Pollard, Arman Mahboubi Soufiani , et al. · 2020

We present a 'post-mortem' procedure for analyzing degradation of fielded photovoltaic modules. We use this procedure to investigate degradation mechanisms in silicon heterojunction (SHJ) modules. We study cell fragments cored from two mod…

Advances in Coring Procedures of Silicon Photovoltaic Modules Open

Helio Moutinho, Bobby To, Dana B. Kern, Chun‐Sheng Jiang, Mowafak Al‐Jassim , et al. · 2020

We describe advances on procedures used for the coring of silicon photovoltaic modules. These procedures involve the coring of specific locations, starting from the back of the modules, and the removal of selected parts of the cell structu…

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