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Disputas: Muhammad Tayyib om solcelle-silikon

Muhammad Tayyib har testet Elkem Solars billigere silicon-materiale mot referanse-siliconet, og viser i avhandlingen at solcelle-energiproduksjonen er like god med lavere produksjonskostnad.

Artikkelen er mer enn to år gammel, og kan inneholde utdatert informasjon.

Muhammad Tayyib disputerer i mekatronikk med avhandlingen “Degradation and Performance Studies of Elkem Solar Grade Silicon in Comparison to the Reference Polysilicon” (Foto: Privat)

Muhammad Tayyib disputerer i mekatronikk med avhandlingen “Degradation and Performance Studies of Elkem Solar Grade Silicon in Comparison to the Reference Polysilicon” (Foto: Privat)

Testene er foretatt under like forhold – både i laboratorium og under åpen himmel. Konklusjonen er at Elkem Solars metode bør komme i økende bruk.

Muhammad Tayyib disputerer på Fakultet for teknologi og realfags doktorgradsutdanning med spesialisering i mekatronikk.

Slik beskriver kandidaten selv essensen i avhandlingen:

Degradation and Performance Studies of Elkem Solar Grade Silicon in Comparison to the Reference Polysilicon

The demand of energy is increasing day by day due to both the increment of world population and the global improvement of the standard of living. The conventional energy production from fossil fuels emits lots of greenhouse gases which in turn significantly contribute to the global warming.

Hence, the energy production from alternate sources has drawn much attention among scientists to protect the environmental development in addition to meet the energy demands.

PV-systems gaining market

Furthermore, the increasing energy prices from fossil fuels together with a dramatic cost reduction of solar cells have levelled cost of electricity produced by photovoltaic (PV) systems.

Solar cells made from silicon cover almost the whole PV market.

The low cost multicrystalline silicon solar cells holds about  90% market share due to lower costs compared to the more advanced single crystal technology, but have a little lower conversion efficiency.

The usage of less expensive silicon feedstock for making multicrystalline solar cells promises, even more, cost reduction per energy produced for the photovoltaic market. The Elkem Solar Grade Silicon (ESS™) feedstock manufactured by Elkem Solar® is one of the great inventions to realize the goal of inexpensive renewable energy on a large scale.

It is important to fully understand the performance of solar cells made by materials from alternative process routes.

Cheaper silicon performs equally well as the reference

In this dissertation, we have addressed our experimental observations, carried out indoor in the laboratory as well as outdoor field performance tests, to make a comprehensive performance comparison of solar cells from ESS™ feedstock with the solar cells from reference (Siemens process) polysilicon feedstock.

More specifically, besides the feedstock, all processes starting from ingot solidification till screen printed solar cells and module processing have been kept identical to have valid comparison of both technologies.

It is concluded that the Elkem Solar® material performs equally well as the more costly standard material and should be used extensively in the future in order to save both costs and energy for producing the cells.

Disputasfakta:

Kandidaten: Muhammad Tayyib was born and raised in Lahore, Pakistan. Tayyib took a Bachelor degree in Metallurgical and Material Engineering from University of Engineering and Technology Lahore, Pakistan. Then he moved to Germany and took a Master Degree in Material Science Engineering. The master thesis was entitled “Angular Dependent Measurements of the Quantum Efficiency of Silicon Thin Film Solar cells”.

Tayyib is now employed at Department of Micro- and Nanosystem Technology of Høgskolen i Buskerud og Vestfold (HBV). His main areas of work is characterization of materials. 

Prøveforelesning og disputas finner sted i Rom C2-040, Campus Grimstad

Dekan Frank Reichert leder disputasen.

Tid for prøveforelesning: Torsdag 29. oktober 2015 kl 10:00

Oppgitt emne for prøveforelesning: “Offshore and onshore wind energy -comparison of energy prices, environmental consequences etc.”

Tid for disputas: Torsdag 29. oktober 2015 kl 12:00

Tittel på avhandling: “Degradation and Performance Studies of Elkem Solar Grade Silicon in Comparison to the Reference Polysilicon”

Søk etter avhandlingen i AURA - Agder University Research Archive, som er et digitalt arkiv for vitenskapelige artikler, avhandlinger og masteroppgaver fra ansatte og studenter ved Universitetet i Agder. AURA blir jevnlig oppdatert.

Opponenter:

Førsteopponent: Professor Joseph Appelbaum, Tel Aviv University, Israel

Annenopponent: Professor Vidar Hansen, Universitetet i Stavanger

Bedømmelseskomitéen er ledet av professor Kjell Gunnar Robbersmyr, UiA

 

Veiledere i doktorgradsarbeidet var professor Tor Oskar Sætre (hovedveileder), professor Ole-Morten Midtgård (se også NTNU-profil) (bi-veileder)