Semiconductor nanocrystals photosensitize C60 crystals |
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| Authors: | Biebersdorf Andreas Dietmüller Roland Susha Andrei S Rogach Andrey L Poznyak Sergey K Talapin Dmitri V Weller Horst Klar Thomas A Feldmann Jochen |
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| Affiliation: | Photonics and Optoelectronics Group, Physics Department and CeNS, Ludwig-Maximilians-Universit?t München, Germany. |
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| Abstract: | Semiconductor nanocrystals (SCNCs) made of CdSe, CdTe, and InP are used to photosensitize needlelike C(60) crystals. The photocurrent is increased by up to 3 orders of magnitude as compared with C(60) crystals without SCNCs. The photocurrent spectrum can be tuned precisely by the SCNC size and material, rendering the SCNC-functionalized C(60) crystals an excellent material for spectrally tuneable photodetectors. We explain the increased photocurrent as a result of photoexcited electrons transferring from the SCNCs to the C(60) crystals and causing photoconductivity, while the complementary holes remain trapped in the SCNCs. |
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