{"doi":"10.1063/5.0022549","title":"Photoluminescence in PbS nanocrystal thin films: Nanocrystal density, film morphology and energy transfer","abstract":"<jats:p>We show that photoluminescence properties of PbS nanocrystal thin films are directly related to film morphology and nanocrystal density. In densely packed PbS nanocrystal films, low-temperature donor-to-acceptor energy transfer is mainly responsible for the photoluminescence spectra narrowing and shift toward longer wavelengths. At elevated temperatures, back energy transfer is proposed to be responsible for an unusual photoluminescence intensity temperature dependence. In thin films with a low PbS nanocrystal density, the energy transfer is suppressed, and the effect is dramatically reduced.</jats:p>","journal":"Journal of Applied Physics","year":2020,"id":27277,"datarank":0.357565994412305,"base_score":1.791759469228055,"endowment":1.791759469228055,"self_citation_contribution":0.26876392038420827,"citation_network_contribution":0.08880207402809677,"self_endowment_contribution":0.26876392038420827,"citer_contribution":0.08880207402809677,"corpus_percentile":null,"corpus_rank":null,"citation_count":5,"citer_count":4,"citers_with_citation_signal":4,"citers_with_endowment":4,"datacite_reuse_total":1,"is_dataset":false,"is_dataset_confidence":null,"is_data_producer":false,"deposit_databanks":null,"is_oa":false,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":null,"fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":155761,"name":"M. Alam","orcid":null,"position":1,"is_corresponding":false},{"id":155762,"name":"S. B. Hafiz","orcid":null,"position":2,"is_corresponding":false},{"id":155763,"name":"D.-K. Ko","orcid":"0000-0003-1834-0241","position":3,"is_corresponding":false},{"id":155764,"name":"A. M. Bratkovsky","orcid":null,"position":4,"is_corresponding":false},{"id":10720,"name":"X. Wu","orcid":"0000-0001-7655-389X","position":5,"is_corresponding":false},{"id":155765,"name":"D. J. Lockwood","orcid":"0000-0002-3001-2630","position":6,"is_corresponding":false},{"id":155760,"name":"L. Tsybeskov","orcid":"0000-0002-4514-6981","position":0,"is_corresponding":false}],"reference_count":0,"raw_metadata":{"has_enrichment":true,"base_score":1.791759469228055,"endowment":1.791759469228055,"datacite_reuse_total":1,"file_count":0,"downloads":0,"views":0,"has_version_chain":false,"is_dataset":false,"is_oa":false,"pmid":"24523987","pmcid":null,"openalex_id":"https://openalex.org/W3091030003","authors":[],"funders":[{"funder_name":"United States National Science Foundation","grant_id":"ECCS-1809112","title":null},{"funder_name":"National Science Foundation","grant_id":"1809112","title":"Collaborative Research: Silver-Based Colloidal Quantum Dot Devices for Ubiquitous Mid-Wavelength Infrared Sensing"}],"total_grants":2,"fwci":0.3258,"citation_percentile":0.50977404,"influential_citations":0,"citation_trend":[{"year":2021,"count":2},{"year":2023,"count":2},{"year":2025,"count":1}],"oa_status":"green","license":"arXiv Non-Exclusive Distribution","oa_locations":[{"url":"https://arxiv.org/pdf/2010.02157","host_type":"repository"},{"url":"https://arxiv.org/pdf/2010.02157","host_type":"GREEN"},{"url":"https://arxiv.org/pdf/2010.02157","host_type":"repository"},{"url":"https://pubs.aip.org/aip/jap/article-pdf/doi/10.1063/5.0022549/15254270/134301_1_online.pdf","host_type":"publisher"},{"url":"http://arxiv.org/abs/2010.02157","host_type":"repository"},{"url":"https://doi.org/10.1063/5.0022549","host_type":"journal"},{"url":"http://arxiv.org/pdf/2010.02157","host_type":""},{"url":"https://dx.doi.org/10.48550/arxiv.2010.02157","host_type":""},{"url":"https://dx.doi.org/10.1063/5.0022549","host_type":""}],"fields_of_study":["Quantum Dots Synthesis And Properties","Chalcogenide Semiconductor Thin Films","Nanocluster Synthesis and Applications","Physics","Materials Science","0103 physical sciences","02 engineering and technology","0210 nano-technology","01 natural sciences"],"mesh_terms":[],"keywords":["Photoluminescence","Nanocrystal","Materials science","Thin film","Optoelectronics","Nanotechnology","Condensed Matter - Mesoscale and Nanoscale Physics","Mesoscale and Nanoscale Physics (cond-mat.mes-hall)","FOS: Physical sciences"],"sdg_mappings":[{"sdg_number":7,"sdg_label":"7. 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