Photocurrent generation in random networks of multiwall-carbon-nanotubes grown by an “all-laser” process

El Khakani, M. A.; Le Borgne, V.; Aïssa, B.; Rosei, F.; Scilletta, C.; Speiser, E.; Scarselli, M.; Castrucci, P.; De Crescenzi, M.
August 2009
Applied Physics Letters;8/24/2009, Vol. 95 Issue 8, p083114
Academic Journal
We report photocurrent generation in entangled networks of multiwall-carbon nanotubes (MWCNTs) grown on TiN/Si substrates by an all-laser process. By integrating these MWCNTs into planar devices, we demonstrate that they generate photocurrent over all the visible and near-ultraviolet range, with maximum efficiency around 420 nm. Photocurrent is obtained even at zero applied voltage, pointing to a true photovoltaic (PV) effect. The extracted photocurrent as a function of applied voltage exhibits nonlinear behavior for voltages ≥2 V, suggesting that the devices do not behave as pure photoresistances. Other mechanisms (e.g., Schottky barriers imbalance) are invoked to describe current flow in these PV devices.


Related Articles

  • Ceasing of voltage switching amongst graphitic shells in multiwalled carbon nanotubes: A route toward stability. Kulshrestha, Neha; Misra, Abhishek; Bajpai, Reeti; Roy, Soumyendu; Misra, D. S. // Applied Physics Letters;1/23/2012, Vol. 100 Issue 4, p043505 

    Weakly interacting graphitic shells of different resistivities within multiwalled carbon nanotubes (MWNTs) cause instability in current and thus limit their reliability for electronic device applications. We here demonstrate voltage switching amongst graphitic shells of MWNTs by applying current...

  • Efficient photovoltage multiplication in carbon nanotubes. Yang, Leijing; Wang, Sheng; Zeng, Qingsheng; Zhang, Zhiyong; Pei, Tian; Li, Yan; Peng, Lian-Mao // Nature Photonics;Nov2011, Vol. 5 Issue 11, p672 

    Carbon nanotubes are direct-bandgap materials that are not only useful for nanoelectronic applications, but also have the potential to make a significant impact on the next generation of photovoltaic technology. A semiconducting single-walled carbon nanotube (SWCNT) has an unusual band...

  • New Material Promises Higher-performance Electronics.  // News India Times;1/23/2015, Vol. 46 Issue 4, p10 

    The article focuses on carbon nanotubes which promise electronics with higher-performance, based on material engineers including an Indian origin scientist from the University of Wisconsin-Madison.

  • MY GADGET LIFE Sir James Dyson.  // Stuff;Mar2013, Issue 168, p30 

    The article offers information regarding research and inventions in electronic gadgets with graphene and carbon nanotubes.

  • Improved lateral photovoltaic effect of Ti and carbon films by interface modification with single-walled carbon nanotubes. Jing Lu; Hui Wang // Journal of Applied Physics;2014, Vol. 115 Issue 3, p1 

    An efficiently improved lateral photovoltaic effect (LPE) has been successfully observed in Ti/Si and amorphous carbon (a-C) film/Si structures by introducing single-walled carbon nanotubes (SWNTs) as modifying interface instead of native SiO2 layer grown on Si substrate. The largest lateral...

  • Polymer Combines Properties of Metals and Plastics.  // JOM: The Journal of The Minerals, Metals & Materials Society (TM;Aug2007, Vol. 59 Issue 8, p9 

    The article focuses on the efforts of researchers at the University of Virginia to develop a material that combines the conductive properties of metals with the light weight of plastics for use in electronic devices. Carbon nanotubes played a significant role in the study according to...

  • Remote Joule heating by a carbon nanotube. Baloch, Kamal H.; Voskanian, Norvik; Bronsgeest, Merijntje; Cumings, John // Nature Nanotechnology;May2012, Vol. 7 Issue 5, p316 

    Minimizing Joule heating remains an important goal in the design of electronic devices. The prevailing model of Joule heating relies on a simple semiclassical picture in which electrons collide with the atoms of a conductor, generating heat locally and only in regions of non-zero current...

  • Air-stable p-n junction diodes based on single-walled carbon nanotubes encapsulating Fe nanoparticles. Li, Y. F.; Hatakeyama, R.; Shishido, J.; Kato, T.; Kaneko, T. // Applied Physics Letters;4/23/2007, Vol. 90 Issue 17, p173127 

    The authors report electrical transport properties of p-n junction based on semiconducting single-walled carbon nanotubes (SWCNTs). The formation of p-n junction is realized in SWCNTs, which are encapsulated with Fe nanoparticles at low filling fractions. The devices exhibit an excellent...

  • Electrical Applications for Novel Carbon Nanotube Morphologies: Does Function Follow Shape? Bandaru, Prabhakar R.; Rao, Apparao M. // JOM: The Journal of The Minerals, Metals & Materials Society (TM;Mar2007, Vol. 59 Issue 3, p33 

    Nanoscience promises a future of novel devices and technologies that harness the atomic or molecular structure of matter. An intriguing manifestation of this paradigm is in the electrical properties of nonlinear carbon nanotube (CNT) morphologies, such as nanocoils/helices and branched forms,...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics