Indicators and performance requirements for suppliers’ evaluation in the Brazilian electricity sector DOI Creative Commons
Thamires Eis Duarte, Priscilla Cristina Cabral Ribeiro, Helder Gomes Costa

et al.

Brazilian Journal of Operations & Production Management, Journal Year: 2024, Volume and Issue: 21(3), P. 1984 - 1984

Published: June 17, 2024

Objective: This paper presents a conceptual model comprising performance indicators designed for evaluating suppliers in companies within the electricity sector. Design / Methodology Approach: The was developed based on articles identified from Scopus and Web of Science, which provided their associated requirements, validated by both academics practitioners. A multiple case study method applied, interviews were conducted with nine participants six leading companies, had highest revenues sector Brazil. semistructured administered remotely. For data analysis, authors assessed alignment essential requirements suppliers' evaluation. evaluation carried out using Lawshe’s (1975) scale, Content Validity Ratio (CVR), critical CVR (Wilson et al., 2012). Results: consists tree groups indicators: quality, logistics, financial. In public facilitated external integration, whereas private this enabled internal integration. findings show that some not applicable to practice, while all context practitioners’ reality. Limitations investigation: notable limitation is relatively small number interviewees, particularly academic sample. Practical implications: proposal these aims guide more precise supplier procurement operation departments, manage valuable input (spare parts). Originality Value: meet scale calculation CVR, further two different actors (academics practitioners) found publications concerning suppliers’

Language: Английский

Solution‐Processable and Ambient‐Stable Highly Conductive p‐Type Polymers Derived from Dihydropyrazine and Ethylenedioxythiophene DOI Creative Commons
Sung Jae Jeon, Naixin Zhao, Yi Yuan

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 5, 2025

Abstract π‐Conjugated polymers (CPs) with high conductivity, solution processability, and ambient stability are vital for advancing printed electronics. However, achieving conductivities over 1000 S cm⁻¹ remains challenging. This study introduces a series of solution‐processable p‐type donor–acceptor (D‐A) CPs based on dihydropyrazine (DHP) ethylenedioxythiophene (EDOT) that address this limitation. The design leverages the ability DHP EDOT to form open‐shell electronic configurations, which promote extended conjugation efficient intrachain charge transport. Strong interchain donor‐acceptor interactions reduce π–π stacking distances, facilitating transport, while electron‐rich units enhance p‐doping efficiency stabilize doped polymer. Additionally, conformational locking effect supports face‐on chain orientation, spaced‐out alkyl side chains improve dopant diffusion. demonstrate exceptional stability, scalability, processability in eco‐friendly solvents, conductivity values up 1700 through sequential doping ferric chloride Magic Blue under conditions. remarkable performance, attributed compact distance 3.38 Å, doping, establishes quinoidal as promising building block development ultrahigh‐conductivity CPs, enabling advancements electronics flexible device applications.

Language: Английский

Citations

0

SLAPE solar panels: a possible solution for the future energy problems of our society DOI Creative Commons
Ibram Ganesh

Discover Sustainability, Journal Year: 2024, Volume and Issue: 5(1)

Published: Aug. 1, 2024

Abstract Today, the silicon photovoltaic cell (SPVC) solar panels are being deployed across globe by all most governments to generate renewable carbon neutral electricity use in place of one generated at thermal power plants burning fossil fuels. These SPVC with less than 20% efficiency, and heat energy more 30% efficiency. This 10% excess released into atmosphere can cause a very severe damage environment ecology as it is million times higher caused equivalent CO 2 gas concentration about 421 ppm. To avoid harmful danger effects these atmosphere, either they have be stopped using or them has trapped for beneficial purposes society any other alternate safe developed. In this study, first time, SLAPE (Semiconductor Liquid Assisted Photothermal Effect) introduced from sunlight. new panels, semiconducting material along stable organic solvent employed capture sunlight reaching earth surface convert energy. situ then converted rotational mechanical help an engine, suitable electric generator. establish Proof Concept (poc), SPV cells γ-butyrolactone were fabricate square meter area panel 17 V AC custom manufactured reciprocally moved steam engine (RMSE) Thus obtained results presented discussed article.

Language: Английский

Citations

3

The Application of Y Series Acceptor-Based Double-Cable Polymers in Single-Material Organic Solar Cells DOI
Xinrong Yang, Yuan Gao, Rui Sun

et al.

Macromolecules, Journal Year: 2024, Volume and Issue: 57(3), P. 1011 - 1020

Published: Jan. 25, 2024

The development of efficient and stable organic photovoltaic (OPV) systems for commercial applications has long been a primary objective. While single-component material have demonstrated promising operational thermal stability, their efficiency still lags behind that multicomponent bulk heterojunction devices due to limitations in scarce building blocks, complex synthesis processes, challenges controlling morphology. In this work, we present novel approach by introducing fused-ring electron acceptor as pendant segment, which offers new possibilities the double-cable copolymers. This innovative strategy not only broadens spectral absorption but also simplifies complexity. Through careful adjustment molecular weight, achieved an outstanding power conversion 9.35% minimized energy loss 0.517 eV, is one best results reported structure well-defined copolymer-based OPVs. Impressively, designed polymers exhibit excellent photo, thermal, mechanical stabilities, further highlighting potential practical applications.

Language: Английский

Citations

2

Unraveling the Formation Process of an Organic Photovoltaic Active Layer During High‐Speed Coating Via a Synergistic Concentration‐Temperature Gradient Control Strategy DOI
Bo Xiao, Weiwei Wu, Shanshan Wang

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 9, 2024

Abstract The Layer‐by‐Layer (LbL) strategy has emerged as a highly effective approach for enhancing the performance of organic photovoltaics (OPVs), notably boosting light harvesting and fill factor through spectral complementarity morphology optimization. Crucially, LbL processing been found to mitigate or overcome decline in power conversion efficiency (PCE) during high‐speed blade coating. Despite these advancements, there remains scarcity research into film‐formation process corresponding control strategies printing. A novel synergistic concentration‐temperature gradient (SCTGC) aimed at achieving high‐performance LbL‐type active layers ultra‐fast coating speeds. This investigation reveals that both baseplate temperature solution concentration exert nonmonotonic regulatory influence on PCEs. Fine‐tuning proves instrumental balancing microfluidic competition within wet film, thereby facilitating stable mass transport film formation process, processability relevant OPV system. Additionally, variations crystallization kinetics under different temperatures are monitored. work sheds mechanism coating, highlighting SCTGC method.

Language: Английский

Citations

2

Indicators and performance requirements for suppliers’ evaluation in the Brazilian electricity sector DOI Creative Commons
Thamires Eis Duarte, Priscilla Cristina Cabral Ribeiro, Helder Gomes Costa

et al.

Brazilian Journal of Operations & Production Management, Journal Year: 2024, Volume and Issue: 21(3), P. 1984 - 1984

Published: June 17, 2024

Objective: This paper presents a conceptual model comprising performance indicators designed for evaluating suppliers in companies within the electricity sector. Design / Methodology Approach: The was developed based on articles identified from Scopus and Web of Science, which provided their associated requirements, validated by both academics practitioners. A multiple case study method applied, interviews were conducted with nine participants six leading companies, had highest revenues sector Brazil. semistructured administered remotely. For data analysis, authors assessed alignment essential requirements suppliers' evaluation. evaluation carried out using Lawshe’s (1975) scale, Content Validity Ratio (CVR), critical CVR (Wilson et al., 2012). Results: consists tree groups indicators: quality, logistics, financial. In public facilitated external integration, whereas private this enabled internal integration. findings show that some not applicable to practice, while all context practitioners’ reality. Limitations investigation: notable limitation is relatively small number interviewees, particularly academic sample. Practical implications: proposal these aims guide more precise supplier procurement operation departments, manage valuable input (spare parts). Originality Value: meet scale calculation CVR, further two different actors (academics practitioners) found publications concerning suppliers’

Language: Английский

Citations

0