About
Daniel Farrell is a JSPS Research Fellow at the New Energy Group at RCAST, University of Tokyo. Previously he was a postdoctoral researcher and postgraduate student in the Experimental Solid State Physics group at Imperial College London. He works on photovoltaic energy conversion, in particularly he is interested in the hot-carrier solar cell, the intermediate band solar cell, and spectral modification of sunlight.
Experience
- JSPS Research Fellow — University of Tokyo, RCAST (Nov 2011 - present)
Currently working on nanostructured hot-carrier solar cells with optical energy selective contacts and dilute nitride intermediate band solar cells. - Research Associate — Imperial College London (Jan 2009 - Oct 2011)
Developed the new concept of the 'optical' hot-carrier solar cell, resulting in 4 provisional patents. Developed a rate/device model for the dynamics of the carrier cooling and heat transport in the hot-carrier materials. - Postgraduate Student — Imperial College London (Oct 2004 - Jan 2009)
Fabricated, characterised and simulated the first quantum dot based luminescent solar concentrator tandem. Wrote optical Monte-Carlo software: pvtrace and performed thermodynamic limiting efficiency analysis of luminescent concentrator devices.
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Recent publications
- M Yoshida, N J Ekins-Daukes, D J Farrell, C C Philips, "Photon ratchet intermediate band solar cells", Applied Physics Letters, 2012, 100(26): 3902–3906. doi: 10.1063/1.4731277
- D J Farrell and M Yoshida, "Operating regimes for second generation luminescent solar concentrators", Progress in Photovoltaics: Research and Applications, 2012, 20(1) 93–99.doi:10.1002/pip.1096
- D J Farrell, Y Takeda, K Nishikawa, T Nagashima, T Motohiro N J Ekins-Daukes, "A hot-carrier solar cell with optical energy selective contact", Applied Physics Letters, 2011, 99(11): 1102–1105. doi: 10.1063/1.3636401
- D J Farrell and N J Ekins-Daukes, "Routes to High-efficiency Photovoltaic Conversion of Solar Energy", Modern Energy Review, 2011, 3(1): 84–88.
- D J Farrell and N J Ekins-Daukes, "Photovoltaic technology: Relay dye boosts efficiency", Nature Photonics, 2009, 3: 373–374. doi:10.1038/nphoton.2009.108
Recent and upcoming presentations
- D J Farrell et al., "TBA" (oral presentation), SPIE Photonics West San Francisco, USA (February 2013).
- D J Farrell et al., "Towards hot-carrier driven up-conversion" (invited presentation), High Efficiency Materials for Photovoltaics Workshop 2012, Imperial College London, UK (September 2012).
- D J Farrell et al., "A new type of hot-carrier solar cell utilising thermal up and down conversion of sunlight" (oral presentation), QUANTSOL 2012 Winter workshop, Bad Gastein, Austria (March 2012).
- D J Farrell et al., "Opportunities for improving high efficiency solar cells by harnessing optical processes" (oral presentation), PV Seminar, University of Kobe, Japan (Feb 2012).
- D J Farrell, "Opportunities for tuning optical rates in high efficiency solar cells" (invited talk), Hans Queisser Seminar, University of Tokyo, Japan (Dec 2011).
- D J Farrell, Y Takeda, K Nishikawa, T Nagashima, T Motohiro N J Ekins-Daukes, "A novel optical hot-carrier solar cell" (oral presentation), The 21st International Photovoltaic Science and Engineering Conference, Fukuoka, Japan (Nov 2011).
- D J Farrell, L Hirst and N J Ekins-Daukes, "Can a hot-carrier solar cell be made?" (oral presentation), UK Semiconductors, University of Sheffield, UK (July 2011).