Solution-processable pyrite FeS2 nanocrystals for the fabrication of heterojunction photodiodes with visible to NIR photodetection
碩士 === 國立臺灣師範大學 === 化學系 === 100 === In this thesis, this study demonstrates a FeS2 NCs as Visible to Near Infrared (NIR) active layers based heterojunction photodiode with a device ITO/ZnO/FeS2 NC/MoO3 /Au. Also, we used ZnO as the hole blocking layer and MoO3 as the hole extraction layer for the de...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2011
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| Online Access: | http://ndltd.ncl.edu.tw/handle/78995731750480807043 |
| Summary: | 碩士 === 國立臺灣師範大學 === 化學系 === 100 === In this thesis, this study demonstrates a FeS2 NCs as Visible to Near Infrared (NIR) active layers based heterojunction photodiode with a device ITO/ZnO/FeS2 NC/MoO3 /Au. Also, we used ZnO as the hole blocking layer and MoO3 as the hole extraction layer for the devices. The formation of FeS2 NCs heterojunction photodiode with satisfied band alignment by the insertion of metal oxide layers effectively suppresses the leakage current and reduces the serial resistance of the device, providing the photodiode with a high on/off ratio of up to 8000 at -1 V under A.M. 1.5 illumination (100 mW/cm2 ). Moreover, the FeS2 NCs heterojunction photodiode promised photoresponse from visble to near infrared (450 nm ~ 1150 nm) at negative bias voltage. In conclusion, the result of using the earth-abundant and non-toxic pyrite nanocrystals (FeS2) /metal oxides heterojunction photodiode device indicates its potential applications in infrared photodetector and has provided a crucial step toward the success in producing colloidal pyrite NCs thin films for low-cost and large-area photovoltaic.
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