{"created":"2023-05-15T11:58:54.675360+00:00","id":5118,"links":{},"metadata":{"_buckets":{"deposit":"84eee8f8-e2b8-49cf-ac10-c64af8b5e119"},"_deposit":{"created_by":18,"id":"5118","owners":[18],"pid":{"revision_id":0,"type":"depid","value":"5118"},"status":"published"},"_oai":{"id":"oai:kyutech.repo.nii.ac.jp:00005118","sets":["6:7"]},"author_link":[],"item_20_date_granted_61":{"attribute_name":"学位授与年月日","attribute_value_mlt":[{"subitem_dategranted":"2017-03-24"}]},"item_20_degree_grantor_59":{"attribute_name":"学位授与機関","attribute_value_mlt":[{"subitem_degreegrantor":[{"subitem_degreegrantor_name":"九州工業大学"}],"subitem_degreegrantor_identifier":[{"subitem_degreegrantor_identifier_name":"17104","subitem_degreegrantor_identifier_scheme":"kakenhi"}]}]},"item_20_degree_name_58":{"attribute_name":"学位名","attribute_value_mlt":[{"subitem_degreename":"博士（工学）"}]},"item_20_description_30":{"attribute_name":"目次","attribute_value_mlt":[{"subitem_description":"1. Introduction||2. Instrumentation & Characterization||3. Effects of different chloride precursors on crystal growth of lead halide perovskites||4. Sulfur doped low band gap bismuth based perovskites for solar cells application||5. General Conclusion","subitem_description_type":"TableOfContents"}]},"item_20_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"MAPbI3 with chloride additive is the suitable material for planar architecture of perovskite solar cells and it also have very good photoluminescence property. Addition of chloride ions highly enhances the carrier life time, diffusion length, crystal formation and film morphology in MAPbI3. Different chloride based additives are highly crucial in deciding most of the physicochemical properties in lead based perovskite CH3NH3PbI3. In the present study optimized quantity and nature of chloride precursor used for formation of large perovskite crystals with minimal disorder were explored. It was found that the addition of ethyl ammonium chloride （EACl） increased the crystal size, which is nearly twice （158 nm） the size of standard perovskite crystals （93 nm） having a preferential orientation towards the （110） plane. Photoacoustic studies demonstrated that the disorder in the perovskite crystals was highly reduced by the addition of the EACl precursor. The effect of the alkyl chain length of an alkyl ammonium chloride precursor on the crystal growth of CH3NH3PbI3 was systematically investigated. In addition, we also used the different solvents in two step method with EACl to reduce the surface roughness of the perovskite layer. Recently, bismuth based perovskites with the structure （CH3NH3）3Bi2I9 （MBI） are rapidly emerging as eco-friendly and stable semiconducting material as a substitute for the lead halide perovskites. Relatively wider bandgap of MBI （~ 2.1 eV） has been found to be a bottleneck in realizing the high photovoltaic performance similar to that of lead halide based perovskites. Therefore, we demonstrated the bandgap engineering of novel bismuth based perovskites obtained by in-situ sulfur doping of MBI via the thermal decomposition of Bi（xt）3 （xt = Ethyl Xanthate） precursor. Color of the obtained films were clearly changed from orange to black when annealed from 80C to 120C with bandgap of 1.45 eV, which is even lower than that of most commonly used lead halide perovskites. After successfully reduced the bandgap of the materials, the electronic properties of the material was also studied to find its suitability in the solar cells. The electronic properties such as carrier concentration, mobility, and carrier life time was found to be higher in sulfur doped MBI when compared to undoped MBI.","subitem_description_type":"Abstract"}]},"item_20_description_5":{"attribute_name":"備考","attribute_value_mlt":[{"subitem_description":"九州工業大学博士学位論文 学位記番号:生工博甲第279号 学位授与年月日:平成29年3月24日","subitem_description_type":"Other"}]},"item_20_description_60":{"attribute_name":"学位授与年度","attribute_value_mlt":[{"subitem_description":"平成28年度","subitem_description_type":"Other"}]},"item_20_dissertation_number_62":{"attribute_name":"学位授与番号","attribute_value_mlt":[{"subitem_dissertationnumber":"甲第279号"}]},"item_20_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.18997/00006330","subitem_identifier_reg_type":"JaLC"}]},"item_20_text_34":{"attribute_name":"アドバイザー","attribute_value_mlt":[{"subitem_text_value":"早瀬, 修二"}]},"item_20_version_type_63":{"attribute_name":"出版タイプ","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_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Vigneshwaran,  Murugan","creatorNameLang":"en"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2017-08-24"}],"displaytype":"detail","filename":"sei_k_279.pdf","filesize":[{"value":"3.2 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"sei_k_279.pdf","objectType":"fulltext","url":"https://kyutech.repo.nii.ac.jp/record/5118/files/sei_k_279.pdf"},"version_id":"c483588e-46f8-44f5-aab2-302cd421e849"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"Perovskite","subitem_subject_scheme":"Other"},{"subitem_subject":"Lead based","subitem_subject_scheme":"Other"},{"subitem_subject":"Grain size","subitem_subject_scheme":"Other"},{"subitem_subject":"Less defect","subitem_subject_scheme":"Other"},{"subitem_subject":"Lead free","subitem_subject_scheme":"Other"},{"subitem_subject":"Low bandgap","subitem_subject_scheme":"Other"}]},"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":"Inorganic light absorbers for printable solar cell applications","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Inorganic light absorbers for printable solar cell applications","subitem_title_language":"en"},{"subitem_title":"無機光吸収材料のプリンタブル太陽電池への応用","subitem_title_language":"ja"}]},"item_type_id":"20","owner":"18","path":["7"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2017-08-24"},"publish_date":"2017-08-24","publish_status":"0","recid":"5118","relation_version_is_last":true,"title":["Inorganic light absorbers for printable solar cell applications"],"weko_creator_id":"18","weko_shared_id":-1},"updated":"2024-01-16T01:52:20.108387+00:00"}