Témakiírások
Investigation and modelling of the operational behavior of silicon/perovskite tandem solar cells
témakiírás címe
Investigation and modelling of the operational behavior of silicon/perovskite tandem solar cells
doktori iskola
témakiíró
tudományág
témakiírás leírása
Perovskite materials are one of the most promising materials for solar cells: cheap and easy to produce, high efficiency and excellent material properties (high absorption coefficient, tuneable bandgap). However, there are also a few drawbacks: limited lifetime caused by degradation due to humidity and temperature.
Recently tandem solar cells based on perovskite in combination with silicon cells have been suggested and developed. While these tandem structures show remarkable efficiency increases in comparison to conventional single junction solar cells, their operational behavior under varying operational conditions is mainly unknown, since current results focus mainly on achieving record efficiencies under standard test conditions. Recent research of our group showed that perovskite and silicon solar cells show essential differences in operational behavior and influence each when used in a tandem arrangement, e. g. showing changes in temperature behavior. Combined with the fact that especially 2-terminal tandem structures are prone to react more sensitive to operational conditions changes the question about operational behavior does not only arise, but represents a serious research gap that will have essential influence on the applicability and viability of the technology.
The planned research intends to fill this research gap and investigate the operational behavior of various tandem solar cell structures with lower silicon and upper perovskite cells. Investigations will include effects of spectrum, temperature, degradation of perovskite cells, etc. The investigations are based on an optically and electrically coupled single diode models for the upper and lower cells, where the device parameters of the top and bottom cells are determined from SCAPS simulations and validation measurements on sample cells. Material characterization for the determination of necessary electrical and optical parameters is performed in cooperation with Semilab, one of the leading companies in semiconductor material characterization. This approach has the advantage that the combination of various top and bottom cells can be studied without the actual technological integration of the bottom and top cells, thus enabling the determination of promising material combinations on a theoretical level, reducing painstaking experimental lab work, and enabling expensive technology development to focus on the most promising simulated structures. The developed models are also planned to be used for the development of digital twins for silicon/perovskite tandem cells which can describe and predict the behavior of existing structure under a wide variety of operational conditions.
Recently tandem solar cells based on perovskite in combination with silicon cells have been suggested and developed. While these tandem structures show remarkable efficiency increases in comparison to conventional single junction solar cells, their operational behavior under varying operational conditions is mainly unknown, since current results focus mainly on achieving record efficiencies under standard test conditions. Recent research of our group showed that perovskite and silicon solar cells show essential differences in operational behavior and influence each when used in a tandem arrangement, e. g. showing changes in temperature behavior. Combined with the fact that especially 2-terminal tandem structures are prone to react more sensitive to operational conditions changes the question about operational behavior does not only arise, but represents a serious research gap that will have essential influence on the applicability and viability of the technology.
The planned research intends to fill this research gap and investigate the operational behavior of various tandem solar cell structures with lower silicon and upper perovskite cells. Investigations will include effects of spectrum, temperature, degradation of perovskite cells, etc. The investigations are based on an optically and electrically coupled single diode models for the upper and lower cells, where the device parameters of the top and bottom cells are determined from SCAPS simulations and validation measurements on sample cells. Material characterization for the determination of necessary electrical and optical parameters is performed in cooperation with Semilab, one of the leading companies in semiconductor material characterization. This approach has the advantage that the combination of various top and bottom cells can be studied without the actual technological integration of the bottom and top cells, thus enabling the determination of promising material combinations on a theoretical level, reducing painstaking experimental lab work, and enabling expensive technology development to focus on the most promising simulated structures. The developed models are also planned to be used for the development of digital twins for silicon/perovskite tandem cells which can describe and predict the behavior of existing structure under a wide variety of operational conditions.
felvehető hallgatók száma
1 fő
helyszín
EET
jelentkezési határidő
2026-01-15