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作者 Marton, Andras
書名 Understanding the performance determining processes in dye sensitized solar cells
國際標準書號 9780542956164
book jacket
說明 167 p
附註 Source: Dissertation Abstracts International, Volume: 67-11, Section: B, page: 6396
Adviser: Gerald J. Meyer
Thesis (Ph.D.)--The Johns Hopkins University, 2007
The work presented in this thesis is aimed at optimizing the performance of the dye-sensitized solar cell (DSSC). Chapter 1 presents a brief overview of the history of solar cells and introduces the reader to the components, mechanisms and characterization techniques relevant to the DSSC. Chapter 2 describes the effect pH has on electron injection and collection processes in DSSC's. Charge collection efficiency, and not the electron injection yield, was related to the TiO2 surface protonation-deprotonation equilibria. In Chapter 3 we examine alternate redox mediators to optimize the regeneration of the oxidized sensitizer while maximizing open circuit voltage (VOC ). Bipyrazine based ruthenium sensitizers anchored to SnO2 had higher photocurrent efficiencies and cell voltages with the alternative redox mediator (SeCN)2/SeCN- than with the commonly used I3-/I-. In Chapter 4 the interaction of iodide with a ruthenium polypyridyl sensitizer was studied to elucidate the workings of the iodide/tri-iodide redox mediator. The interaction between the sensitizer and iodide in solid phase and in dichloromethane solution was shown to potentially improve solar cell performance. A more specific interaction between iodide and a zinc tetraphenylporphyrin sensitizer was shown to improve the light harvesting efficiency of the DSSC in Chapter 5
School code: 0098
DDC
Host Item Dissertation Abstracts International 67-11B
主題 Chemistry, Inorganic
Chemistry, Physical
Energy
0488
0494
0791
Alt Author The Johns Hopkins University
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