{"id":"https://openalex.org/A5111566976","orcid":null,"observed_orcids":[],"display_name":"Takao Matsuyama","raw_author_names":["Takao Matsuyama"],"full_name":"Takao MATSUYAMA","works_count":13,"cited_by_count":860,"summary_stats":{"2yr_mean_citedness":0.0,"h_index":7,"i10_index":7},"ids":{"openalex":"https://openalex.org/A5111566976","orcid":null,"observed_orcids":[]},"affiliations":[{"institution":{"id":"https://openalex.org/I3412056","ror":"https://ror.org/03wrs2f16","display_name":"Sanyo (Japan)","country_code":"JP","type":"company","lineage":["https://openalex.org/I3412056"]},"years":[1994,1993,1992,1990,1989]},{"institution":{"id":"https://openalex.org/I4405282743","ror":"https://ror.org/00d7e4b79","display_name":"Sanyo Electric (Japan)","country_code":"JP","type":"company","lineage":["https://openalex.org/I1283155146","https://openalex.org/I4405282743"]},"years":[1993,1990]}],"last_known_institutions":null,"topics":[{"id":"https://openalex.org/T10623","display_name":"Thin-Film Transistor Technologies","count":13,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10624","display_name":"Silicon and Solar Cell Technologies","count":13,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10590","display_name":"Chalcogenide Semiconductor Thin Films","count":7,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11169","display_name":"Silicon Nanostructures and Photoluminescence","count":2,"subfield":{"id":"https://openalex.org/subfields/2505","display_name":"Materials Chemistry"},"field":{"id":"https://openalex.org/fields/25","display_name":"Materials Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12309","display_name":"solar cell performance optimization","count":2,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"topic_share":[{"id":"https://openalex.org/T10623","display_name":"Thin-Film Transistor Technologies","value":6.5e-05,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10624","display_name":"Silicon and Solar Cell Technologies","value":5.48e-05,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10590","display_name":"Chalcogenide Semiconductor Thin Films","value":4.93e-05,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11169","display_name":"Silicon Nanostructures and Photoluminescence","value":1.9e-05,"subfield":{"id":"https://openalex.org/subfields/2505","display_name":"Materials Chemistry"},"field":{"id":"https://openalex.org/fields/25","display_name":"Materials Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12309","display_name":"solar cell performance optimization","value":1.78e-05,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"x_concepts":[{"id":"192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","score":0.9132366180419922},{"id":"2780824857","wikidata":"https://www.wikidata.org/wiki/Q58803","display_name":"Solar cell","score":0.6703358292579651},{"id":"49040817","wikidata":"https://www.wikidata.org/wiki/Q193091","display_name":"Optoelectronics","score":0.6653751134872437},{"id":"2779227376","wikidata":"https://www.wikidata.org/wiki/Q6505497","display_name":"Layer (electronics)","score":0.6038702130317688},{"id":"171250308","wikidata":"https://www.wikidata.org/wiki/Q11468","display_name":"Nanotechnology","score":0.3314962387084961}],"counts_by_year":[{"year":1987,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":1989,"works_count":2,"oa_works_count":2,"cited_by_count":0},{"year":1990,"works_count":2,"oa_works_count":2,"cited_by_count":0},{"year":1992,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":1993,"works_count":4,"oa_works_count":0,"cited_by_count":0},{"year":1994,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2012,"works_count":0,"oa_works_count":0,"cited_by_count":38},{"year":2013,"works_count":0,"oa_works_count":0,"cited_by_count":45},{"year":2014,"works_count":1,"oa_works_count":1,"cited_by_count":53},{"year":2015,"works_count":0,"oa_works_count":0,"cited_by_count":30},{"year":2016,"works_count":0,"oa_works_count":0,"cited_by_count":40},{"year":2017,"works_count":0,"oa_works_count":0,"cited_by_count":40},{"year":2018,"works_count":0,"oa_works_count":0,"cited_by_count":43},{"year":2019,"works_count":0,"oa_works_count":0,"cited_by_count":42},{"year":2020,"works_count":0,"oa_works_count":0,"cited_by_count":29},{"year":2021,"works_count":0,"oa_works_count":0,"cited_by_count":41},{"year":2022,"works_count":0,"oa_works_count":0,"cited_by_count":27},{"year":2023,"works_count":0,"oa_works_count":0,"cited_by_count":34},{"year":2024,"works_count":0,"oa_works_count":0,"cited_by_count":20},{"year":2025,"works_count":0,"oa_works_count":0,"cited_by_count":24},{"year":2026,"works_count":0,"oa_works_count":0,"cited_by_count":8}],"display_name_alternatives":["Takao Matsuyama"],"block_key":"t matsuyama","works_api_url":"https://api.openalex.org/works?filter=author.id:A5111566976","updated_date":"2026-11-04T11:47:51","created_date":"2016-06-24T00:00:00"}