{"_buckets": {"deposit": "6190ddd9-e5ad-4fef-9ded-623363d6b491"}, "_deposit": {"id": "1893", "owners": [], "pid": {"revision_id": 0, "type": "recid", "value": "1893"}, "status": "published"}, "_oai": {"id": "oai:meral.edu.mm:recid/1893", "sets": ["user-uy"]}, "communities": ["ccm", "ccp", "kyauksetu", "ltc", "maas", "miit", "mlmu", "mmu", "mtlu", "mtu", "mub", "mude", "mufl", "pathein", "scu", "suoe", "tcu", "tgu", "tuh", "tum", "ucsm", "ucsmtla", "ucsmub", "ucspathein", "ucstaungoo", "ucsy", "udmm", "udmy", "uit", "um", "um1", "um2", "umkn", "umm", "uphy", "urj", "uvs", "uy", "yau", "ydbu", "ytu", "yude", "yueco", "yufl", "yuoe"], "control_number": "1893", "item_1583103067471": {"attribute_name": "Title", "attribute_value_mlt": [{"subitem_1551255647225": "SYNTHESIS OF ZnO NANOCRYSTALS FOR ORGANIC-INORGANIC HYBRID SOLAR CELLS", "subitem_1551255648112": "en"}]}, "item_1583103085720": {"attribute_name": "Description", "attribute_value_mlt": [{"interim": "In this study, we present the synthesis of ZnO nanocrystals (NCs) by alkaline-activated hydrolysis\u0027 and condensation of Zn2+ and its application for hybrid solar cells. Temperature dependence of the optical and structural properties of ZnO NCs was investigated and its applicability to hybrid solar cells was then examined. In a typical preparation, 6 ml of 0.55M N(Me)4OH in EtOH was added dropwise to O.1M Zn(OAc)2 dissolved in 20 ml DMSO under constant stirring at varying temperatures (26-80°C). The nanocrystals were precipitated after 5 min, washed with ethyl acetate and finally resuspended in 6 ml ethanol. \r TEM images of ZnO nanocrystals synthesized at different temperatures are shown in Figure 1. At room temperature synthesis, monodispersed ZnO nanocrystals with a mean diameter of 4.42 nm were formed as demonstrated in Figure 1(a). Increasing the temperature to 40°C, the mean diameter of the nanocrystals increased to about 5.24 nm. As can be observed, the particles have started to agglomerate due to Oswald ripening process. At higher temperatures of 60°C and 80°C, larger particles with mean diameters of 6.70 and 7.73 urn developed, respectively, as seen in Figure 1(c) and 1(d). Figure 1(e) presents the SAED pattern of the sample synthesized at 80°C and the rings are indexed to (100) (002) (101) (103) (112) (102) and (110) crystal planes of hexagonal wurtzite phase of ZnO. Photoluminescence and absorption spectra (not shown here) showed a blue shift to shorter wavelengths indicating quantum confinement and larger band gap at lower reaction temperature.\r In a separate synthesis, TOPO was used as capping agent for 2nO NCs produced at room temperature and 30 min reaction time. This was usIn this study, we present the synthesis of ZnO nanocrystals (NCs) by alkaline-activated hydrolysis\u0027 and condensation of Zn2+ and its application for hybrid solar cells. Temperature dependence of the optical and structural properties of ZnO NCs was investigated and its applicability to hybrid solar cells was then examined. In a typical preparation, 6 ml of 0.55M N(Me)4OH in EtOH was added dropwise to O.1M Zn(OAc)2 dissolved in 20 ml DMSO under constant stirring at varying temperatures (26-80°C). The nanocrystals were precipitated after 5 min, washed with ethyl acetate and finally resuspended in 6 ml ethanol. \r TEM images of ZnO nanocrystals synthesized at different temperatures are shown in Figure 1. At room temperature synthesis, monodispersed ZnO nanocrystals with a mean diameter of 4.42 nm were formed as demonstrated in Figure 1(a). Increasing the temperature to 40°C, the mean diameter of the nanocrystals increased to about 5.24 nm. As can be observed, the particles have started to agglomerate due to Oswald ripening process. At higher temperatures of 60°C and 80°C, larger particles with mean diameters of 6.70 and 7.73 urn developed, respectively, as seen in Figure 1(c) and 1(d). Figure 1(e) presents the SAED pattern of the sample synthesized at 80°C and the rings are indexed to (100) (002) (101) (103) (112) (102) and (110) crystal planes of hexagonal wurtzite phase of ZnO. Photoluminescence and absorption spectra (not shown here) showed a blue shift to shorter wavelengths indicating quantum confinement and larger band gap at lower reaction temperature.\r In a separate synthesis, TOPO was used as capping agent for 2nO NCs produced at room temperature and 30 min reaction time. This was used as the first layer of electron acceptor followed by 2nO NCs produced from the previous experiment. Then, P3HT active layer was spin-coated followed by depositing a MoO3 and Au electrode. The solar cell fabricated from 26°C and 80°C 2nO NCs generated an efficiency of up to 0.02%and 0.09%, respectively\r ed as the first layer of electron acceptor followed by 2nO NCs produced from the previous experiment. Then, P3HT active layer was spin-coated followed by depositing a MoO3 and Au electrode. The solar cell fabricated from 26°C and 80°C 2nO NCs generated an efficiency of up to 0.02%and 0.09%, respectively."}]}, "item_1583103108160": {"attribute_name": "Keywords", "attribute_value_mlt": [{"interim": "2nO nanocrystals"}]}, "item_1583103120197": {"attribute_name": "Files", "attribute_type": "file", "attribute_value_mlt": [{"accessrole": "open_access", "date": [{"dateType": "Available", "dateValue": "2020-05-05"}], "displaytype": "preview", "download_preview_message": "", "file_order": 0, "filename": "Synthesis of ZnO Nanocrystals for Organic-Inorganic hybrid Solar Cells.pdf", "filesize": [{"value": "1057 Kb"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "licensetype": "license_free", "mimetype": "application/pdf", "size": 1057000.0, "url": {"url": "https://meral.edu.mm/record/1893/files/Synthesis of ZnO Nanocrystals for Organic-Inorganic hybrid Solar Cells.pdf"}, "version_id": "abc1a2c4-678d-4552-843e-f8b8d45d22c9"}]}, "item_1583103131163": {"attribute_name": "Journal articles", "attribute_value_mlt": [{"subitem_journal_title": "8th AUN/SEED-Net Regional Conference on Electrical and Electronics Engineering"}]}, "item_1583103147082": {"attribute_name": "Conference papaers", "attribute_value_mlt": [{}]}, "item_1583103211336": {"attribute_name": "Books/reports/chapters", "attribute_value_mlt": [{}]}, "item_1583103233624": {"attribute_name": "Thesis/dissertations", "attribute_value_mlt": [{"subitem_supervisor(s)": []}]}, "item_1583105942107": {"attribute_name": "Authors", "attribute_value_mlt": [{"subitem_authors": [{"subitem_authors_fullname": "Pelicano, Christian Mark"}, {"subitem_authors_fullname": "Tani, Ryosuke"}, {"subitem_authors_fullname": "Ishizumi, Atsushi"}]}]}, "item_1583108359239": {"attribute_name": "Upload type", "attribute_value_mlt": [{"interim": "Other"}]}, "item_1583108428133": {"attribute_name": "Publication type", "attribute_value_mlt": [{"interim": "Other"}]}, "item_1583159729339": {"attribute_name": "Publication date", "attribute_value": "2015"}, "item_1583159847033": {"attribute_name": "Identifier", "attribute_value": "https://uyr.uy.edu.mm/handle/123456789/433"}, "item_title": "SYNTHESIS OF ZnO NANOCRYSTALS FOR ORGANIC-INORGANIC HYBRID SOLAR CELLS", "item_type_id": "21", "owner": "1", "path": ["1582967549708"], "permalink_uri": "http://hdl.handle.net/20.500.12678/0000001893", "pubdate": {"attribute_name": "Deposited date", "attribute_value": "2020-03-05"}, "publish_date": "2020-03-05", "publish_status": "0", "recid": "1893", "relation": {}, "relation_version_is_last": true, "title": ["SYNTHESIS OF ZnO NANOCRYSTALS FOR ORGANIC-INORGANIC HYBRID SOLAR CELLS"], "weko_shared_id": -1}