{"created":"2023-06-26T11:01:08.685329+00:00","id":1768,"links":{},"metadata":{"_buckets":{"deposit":"e60b0535-8914-4d92-9424-3904dca43d47"},"_deposit":{"created_by":22,"id":"1768","owners":[22],"pid":{"revision_id":0,"type":"depid","value":"1768"},"status":"published"},"_oai":{"id":"oai:oist.repo.nii.ac.jp:00001768","sets":["7:200"]},"author_link":[],"item_10006_creator_3":{"attribute_name":"Author","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Winchester, Andrew","creatorNameLang":"en"}]}]},"item_10006_date_granted_11":{"attribute_name":"Degree Conferral Date","attribute_value_mlt":[{"subitem_dategranted":"2020-10-31"}]},"item_10006_degree_grantor_9":{"attribute_name":"Degree Conferrral Institution","attribute_value_mlt":[{"subitem_degreegrantor":[{"subitem_degreegrantor_name":"Okinawa Institute of Science and Technology Graduate University"}],"subitem_degreegrantor_identifier":[{"subitem_degreegrantor_identifier_name":"38005","subitem_degreegrantor_identifier_scheme":"kakenhi"}]}]},"item_10006_degree_name_8":{"attribute_name":"Degree","attribute_value_mlt":[{"subitem_degreename":"Doctor of Philosophy"}]},"item_10006_description_7":{"attribute_name":"Abstract","attribute_value_mlt":[{"subitem_description":"In recent years the class of materials known as hybrid organic-inorganic perovskite (HOIP) have received notable attention for use in photovoltaic applications, with record solar conversion e<br />ciencies reaching other established thin <br />lm systems. Despite their rapid development, there are still ongoing issues related to heterogeneous <br />lm properties which limit device performance. It has been suggested that sites which capture charge carriers (traps) could be localized on a micrometer or smaller size scale, leading to regions of poor e<br />ciency. Understanding the electronic properties of such regions, in particular on how they in<br />uence carrier recombination, will therefore provide crucial information about the carrier loss pathways in HOIP <br />lms, which will be essential for developing new strategies to minimize losses and create more e<br />cient devices. In order to gain information about the ultrafast charge carrier recombination dynamics on nanoscale length scales, specialized techniques which can provide information with both high spatial and temporal resolution will be necessary. Here, we utilize time resolved photoemission electron microscopy (TR-PEEM) as a novel technique to study the nanoscale ultrafast properties of photo excited carriers and their relation to heterogeneous <br />lm properties in HOIP thin <br />lm materials. Following this overall theme, the work in this thesis will address several nanoscale properties and phenomenon. First, we will uncover the nanoscale distribution of carrier traps in a HOIP <br />lm which result in non-radiative losses. We then will describe in depth the ultrafast carrier trapping processes happening at nanoscale trap clusters. Following this, we will then discuss other novel information and studies on the traps in HOIP which can be realized using TR-PEEM, namely on e\u001bects of light treatments and morphological information. By gaining a deeper understanding in these directions, we hope to contribute to the broader goal of improving HOIP photovoltaic device e<br />ciency and showcase TR-PEEM as a novel technique for studying photocarrier dynamics in semiconductor materials.","subitem_description_language":"en","subitem_description_type":"Other"}]},"item_10006_dissertation_number_12":{"attribute_name":"Degree Referral Number","attribute_value_mlt":[{"subitem_dissertationnumber":"甲第62号"}]},"item_10006_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15102/1394.00001604","subitem_identifier_reg_type":"JaLC"}]},"item_10006_rights_13":{"attribute_name":"Copyright Information","attribute_value_mlt":[{"subitem_rights":"© 2020 The Author."}]},"item_10006_text_24":{"attribute_name":"Exam Date","attribute_value_mlt":[{"subitem_text_value":"2020-09-11"}]},"item_10006_version_type_18":{"attribute_name":"Version Format","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_access_right":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"open access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_abf2"}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2020-11-05"}],"displaytype":"detail","filename":"Full Text.pdf","filesize":[{"value":"11.8 MB"}],"format":"application/pdf","licensefree":"Creative Commons Attribution-NonCommercial 4.0 International(https://creativecommons.org/licenses/by-nc/4.0/)","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"Full Text","objectType":"fulltext","url":"https://oist.repo.nii.ac.jp/record/1768/files/Full Text.pdf"},"version_id":"4bcbea58-7f1b-414b-bf76-b35ded80c0df"},{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2020-11-05"}],"displaytype":"detail","filename":"Final Exam Abstract.pdf","filesize":[{"value":"42.9 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"Final Exam Abstract","objectType":"abstract","url":"https://oist.repo.nii.ac.jp/record/1768/files/Final Exam Abstract.pdf"},"version_id":"0090a80c-24ab-4c3b-a7aa-4eb94f7477d8"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"doctoral thesis","resourceuri":"http://purl.org/coar/resource_type/c_db06"}]},"item_title":"有機無機ハイブリッドペロブスカイトの空間的と時間的にトラップ顕微鏡","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"有機無機ハイブリッドペロブスカイトの空間的と時間的にトラップ顕微鏡","subitem_title_language":"ja"},{"subitem_title":"Spatially and temporally resolved microscopy of traps in hybrid organic-inorganic perovskites","subitem_title_language":"en"}]},"item_type_id":"10006","owner":"22","path":["200"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2020-11-05"},"publish_date":"2020-11-05","publish_status":"0","recid":"1768","relation_version_is_last":true,"title":["有機無機ハイブリッドペロブスカイトの空間的と時間的にトラップ顕微鏡"],"weko_creator_id":"22","weko_shared_id":-1},"updated":"2023-08-31T02:52:46.580875+00:00"}