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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Nah, Junghyo
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Publications (3/3 displayed)
- 2019Thermal conductivity enhancement in electrospun poly(vinyl alcohol) and poly(vinyl alcohol)/cellulose nanocrystal composite nanofiberscitations
- 2015뜬 마이크로 디바이스를 이용한 Ge-SixGe1-x Core-Shell Nanowires의 열전도율 측정citations
- 2013Piezoelectric performance enhancement of ZnO flexible nanogenerator by a CuO-ZnO p-n junction formationcitations
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article
Piezoelectric performance enhancement of ZnO flexible nanogenerator by a CuO-ZnO p-n junction formation
Abstract
The piezoelectric potential screening by large excess electrons in nominally undoped ZnO has limited the energy conversion efficiency of the ZnO nanogenerators (NGs). In this study, we report a simple and effective approach to enhance the piezoelectric output performance of the ZnO NGs by forming a CuO-ZnO heterostructure. By depositing a ZnO thin film on the pre-deposited CuO thin film, which forms a p-n junction, excess electrons in ZnO can be effectively reduced. Thus, the piezoelectric potential generated in ZnO by an applied force can be less affected. Using this approach, we obtained an output voltage up to similar to 7.5 V and a maximum current of 4.5 mA cm(-2) measured under the forward connection, which is a 7-fold higher output voltage and an approximately one order of magnitude higher current density by comparison to the ZnO NGs without a CuO layer. Our results clearly demonstrate the effectiveness of a CuO-ZnO heterostructure for realizing high performance flexible energy harvesting devices.