Hot electron effect in nanoscopically thin photovoltaic junctions

Kempa, K.; Naughton, M. J.; Ren, Z. F.; Herczynski, A.; Kirkpatrick, T.; Rybczynski, J.; Gao, Y.
December 2009
Applied Physics Letters;12/7/2009, Vol. 95 Issue 23, p233121
Academic Journal
The open circuit voltage in ultrathin amorphous silicon solar cells is found to increase with light energy (frequency), due to extraction of hot electrons. The ultrathin nature of these junctions also leads to large internal electric fields, yielding reduced recombination and increased current. A simple phenomenological argument provides a qualitative understanding of these effects and gives guidelines for designing future, high-efficiency, hot electron solar cells.


Related Articles

  • Three-Terminal Amorphous Silicon Solar Cells. Cheng-Hung Tai; Chu-Hsuan Lin; Chih-Ming Wang; Chun-Chieh Lin // International Journal of Photoenergy;2011, Special section p1 

    Many defects exist within amorphous silicon since it is not crystalline. This provides recombination centers, thus reducing the efficiency of a typical a-Si solar cell. A new structure is presented in this paper: a three-terminal a-Si solar cell. The new back-to- back p-i-n/n-i-p structure...

  • Extraction of carriers photogenerated at p type amorphous SiC window layer in amorphous Si solar cells. Baik, Seung Jae; Kang, Sang Jung; Lim, Koeng Su // Applied Physics Letters;9/20/2010, Vol. 97 Issue 12, p122102 

    The polarity of built-in electric field in p type amorphous SiC window layer originated from the band alignment with the front electrode, strongly affects carrier collection of amorphous Si solar cells. Additionally, it can be switched by reversing the surface band bending of transparent...

  • II. Introduction to Solar Photovoltaics.  // Solar Photovoltaics Report;2005, Issue 2, p13 

    The article presents an introduction to solar photovoltaics which are solid-state semiconductor devices that convert light directly into electricity. They are usually made of silicon with traces of other elements and are first cousins to transistors, LED's and other electronic devices. The...

  • Higher solar cell effi ciencies taking benefi ts of IC technology experience. Pieters, Philip // ECN: Electronic Component News;Jun2012, Vol. 56 Issue 6, p40 

    The article focuses on the use of semiconductor industrial applications into photovoltaics (PV) industries to increase the efficiency of crystalline silicon solar cells. Techniques which can be implemented in PV industries like ion implantation, atomic layer deposition and use of Copper (Cu)...

  • Analysis of Electrical Characteristics of Photovoltaic Single Crystal Silicon Solar Cells at Outdoor Measurements. Ibrahim, A. // Smart Grid & Renewable Energy;May2011, Vol. 2 Issue 2, p169 

    The electrical performance of a photovoltaic (PV) silicon solar cell is described by its current-voltage (I-V) characteristic curve, which is in turn determined by device and material properties. In this study, an investigation of the performance and device parameters of photovoltaic single...

  • Harry Atwater. Ewers, Justin // U.S. News & World Report;Apr2009, Vol. 146 Issue 3, p75 

    The article discusses research by Harry Atwater of the California Institute of Technology on solar photovoltaics and thin-film materials. His work focuses on silicon "nanorods" that are more efficient than conventional silicon wafers for collection of solar energy. They concentrate light with 5...

  • Optical and photovoltaic properties of silicon wire solar cells with controlled ZnO nanorods antireflection coating. Baek, Seong-Ho; Noh, Bum-Young; Shin, Jang-Kyoo; Kim, Jae // Journal of Materials Science;May2012, Vol. 47 Issue 9, p4138 

    We introduce a new type of silicon micro-wire (SiMW) solar cell with a conformal zinc oxide (ZnO) nanorods anti-reflection coating (ARC) and discuss the optical and photovoltaic properties of the SiMW solar cells with controlled ZnO nanorods. The fabrication processes were composed of...

  • Photovoltaics in EMS Sector. Brown, Darren // Circuits Assembly;Oct2008, Vol. 19 Issue 10, p40 

    The article discusses the potential of the solar cell sector to the electronics manufacturing services (EMS) firms. The author explains that metallization is a vital part of the photovoltaic manufacturing process in silicon solar cells, that effectively attaches electrical interconnect...

  • Temperature Effects on the Electrical Performance of Large Area Multicrystalline Silicon Solar Cells Using the Current Shunt Measuring Technique. Mageed, Hala Mohamed Abdel; Zobaa, Ahmed Faheem; Raouf, Mohamed Helmy Abdel; El-Rahman, Abla Hosni Abd; Aziz, Mohamed Mamdouh Abdel // Engineering;Nov2010, Vol. 2 Issue 11, p888 

    The temperature effects on the electrical performance of a large area multicrystalline silicon solar cell with back-contact technology have been studied in a desert area under ambient conditions using the current shunt measuring technique. Therefore, most of the problems encountered with...


Read the Article


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

Try another library?
Sign out of this library

Other Topics