عنوان
پدید آورنده
موضوع
رده
کتابخانه
محل استقرار
شماره کتابشناسی ملی
شماره
TL9vw2206j
زبان اثر
زبان متن نوشتاري يا گفتاري و مانند آن
انگلیسی
عنوان و نام پديدآور
عنوان اصلي
Synthesis and Characterization of Pyrite Thin Films and Single Crystals for PV Devices and Fundamental Studies
نام عام مواد
[Thesis]
نام نخستين پديدآور
Farhi, Nima
نام ساير پديدآوران
Law, Matthew
وضعیت نشر و پخش و غیره
نام ناشر، پخش کننده و غيره
UC Irvine
تاریخ نشرو بخش و غیره
2016
یادداشتهای مربوط به پایان نامه ها
کسي که مدرک را اعطا کرده
UC Irvine
امتياز متن
2016
یادداشتهای مربوط به خلاصه یا چکیده
متن يادداشت
Iron pyrite is an earth-abundant, non-toxic, and inexpensive semiconductor that has the potential to produce large photocurrents in photovoltaic devices. However, the efficiency of pyrite solar cell devices has been limited by its photovoltage (< 0.2 eV). The surface layer of pyrite has been identified as the reason behind the low efficiency of pyrite devices. Highly pure single crystals of pyrite were synthesized, characterized, and studied in this work to determine ways to boost the photovoltage of pyrite. Based on a numerical modeling of Hall coefficient and conductivity data, it was found that there is a surface inversion layer on the surface of the pyrite crystals. The presence of the inversion layer, plus the ionization of deep bulk donor states at the surface, has resulted in an extreme upward band bending and a sharp triangular potential, across which charge carriers can tunnel and thereby, degrade the VOC. A clear route involving the reduction of the density of the bulk donors by changing the condition of the crystal growth was demonstrated. Theoretical calculations showed that the reduction in the bulk donor density could indeed increase the photovoltage in pyrite photovoltaic devices. Lastly, pyrite single crystals were doped to understand the effect of several elemental impurities (Co, Cr, and Ni) on the optical and electronic properties of pyrite. A combination of experimental characterization techniques along theoretical calculations was necessary to understand the effect of each dopant fully. Overall, this work demonstrates a clear path forward to overcome the problems associated with pyrite and achieve high efficient pyrite solar devices.
نام شخص به منزله سر شناسه - (مسئولیت معنوی درجه اول )
مستند نام اشخاص تاييد نشده
Farhi, Nima
نام شخص - ( مسئولیت معنوی درجه دوم )
مستند نام اشخاص تاييد نشده
Law, Matthew
شناسه افزوده (تنالگان)
مستند نام تنالگان تاييد نشده
UC Irvine
دسترسی و محل الکترونیکی
نام الکترونيکي
مطالعه متن کتاب وضعیت انتشار
فرمت انتشار
p
اطلاعات رکورد کتابشناسی
نوع ماده
[Thesis]
کد کاربرگه
276903
اطلاعات دسترسی رکورد
سطح دسترسي
a
تكميل شده
Y
