Photovoltaics — LLMpedia

Photovoltaics
Andrewglaser (talk) · CC BY-SA 3.0 · source
Name	Photovoltaics
Caption	Utility-scale photovoltaic installation
Type	Renewable energy technology
Invented	19th century
Developer	Scientists and engineers worldwide
Use	Electricity generation

Contents

Photovoltaics are technologies that convert light into electric current using semiconductor materials; they underpin modern renewable energy systems and intersect with institutions like National Renewable Energy Laboratory, Massachusetts Institute of Technology, and corporations such as First Solar, SunPower Corporation, and Tesla, Inc.. Major research programs at organizations including European Commission, Japan Aerospace Exploration Agency, and Lawrence Berkeley National Laboratory have driven advances in materials and manufacturing, while global markets involve stakeholders like World Bank, International Energy Agency, and United Nations Framework Convention on Climate Change.

Overview

Photovoltaic systems use semiconductor junctions, optical components, and power electronics to produce direct current for grids and off-grid setups, with deployment projects coordinated by agencies such as United States Department of Energy, China National Energy Administration, European Investment Bank, and utilities like E.ON and Enel. Commercial modules often incorporate wafers from suppliers linked to BASF, 3M, and LG Electronics, and are certified under standards from Underwriters Laboratories and the International Electrotechnical Commission. Large-scale plants connect through transmission operators including California Independent System Operator, National Grid plc, and Red Eléctrica de España, and storage integration often involves companies like Siemens and Vestas.

Early observations of the photovoltaic effect were made by researchers at institutions such as Bell Labs and individuals like Edmond Becquerel; later milestones include the 1954 demonstration at Bell Laboratories that led to silicon solar cells and subsequent adoption in programs by NASA during the Apollo program. Post-war expansion involved industrial firms like RCA and research centers like Stanford University and University of Cambridge, while policy milestones from Kyoto Protocol and Paris Agreement stimulated market growth and national initiatives in Germany, China, and the United States. Technological commercialization accelerated with corporate entrants such as Sharp Corporation, Kyocera, and Trina Solar and finance mechanisms from institutions like Goldman Sachs and World Bank.

Cell architectures range from crystalline silicon produced by manufacturers such as Wacker Chemie, to thin-film technologies by First Solar using cadmium telluride, and emerging perovskite cells from groups at University of Oxford and EPFL. Tandem and multi-junction designs integrate III-V semiconductors from firms like Intel suppliers and research by NASA Glenn Research Center and Fraunhofer Institute for Solar Energy Systems to reach high efficiencies. Manufacturing involves equipment from Applied Materials, processing standards from Semiconductor Equipment and Materials International, and supply chains with commodity inputs from companies such as Rio Tinto and Glencore for silicon and rare materials. Encapsulation and module reliability draw upon polymers developed by DuPont and testing protocols by International Electrotechnical Commission and Underwriters Laboratories.

Record efficiencies are tracked by laboratories including National Renewable Energy Laboratory, Fraunhofer ISE, and Japan Renewable Energy Foundation, with multijunction concentrator cells developed through collaborations involving NASA, Sandia National Laboratories, and corporate partners. Performance metrics such as module degradation rates, temperature coefficients, and levelized cost of energy are monitored by market analysts at Bloomberg New Energy Finance and academic groups at MIT. Grid integration studies are conducted by system operators like PJM Interconnection and regulators including Federal Energy Regulatory Commission and Ofgem to assess impacts on reliability and capacity factors.

Applications span rooftop systems installed by companies like SolarCity and industrial arrays developed by firms such as Iberdrola, to building-integrated photovoltaics promoted by initiatives in Singapore and Dubai. Off-grid adoption in regions served by World Bank programs and NGOs like SolarAid supports electrification in parts of Sub-Saharan Africa, while agrivoltaics pilot projects involve research institutions such as INRAE and University of Arizona. Large utility projects connect with transmission managed by entities like TransGrid and financing from development banks including Asian Development Bank and European Bank for Reconstruction and Development.

Environmental assessments by organizations such as Intergovernmental Panel on Climate Change and lifecycle analyses from Oak Ridge National Laboratory evaluate greenhouse gas reductions, resource use, and recycling pathways coordinated with firms like Veolia and standards from International Organization for Standardization. Economic impacts include job creation tracked by the International Renewable Energy Agency and supply-chain effects involving mining companies like BHP and manufacturers such as Panasonic. Policy instruments from governments including German Federal Ministry for Economic Affairs and Energy, trade measures adjudicated at the World Trade Organization, and incentive programs like feed-in tariffs in Germany and tax credits in the United States have influenced market dynamics and investment flows.

Category:Energy technology