Open Access. Powered by Scholars. Published by Universities.®

Nanoscience and Nanotechnology Commons

Open Access. Powered by Scholars. Published by Universities.®

Theses/Dissertations

Nanocrystal

Physical Chemistry

Articles 1 - 1 of 1

Full-Text Articles in Nanoscience and Nanotechnology

Ultrafast Optical Studies Of Multiple Exciton Generation In Lead Chalcogenide Quantum Dots, Aaron G. Midgett Jan 2011

Ultrafast Optical Studies Of Multiple Exciton Generation In Lead Chalcogenide Quantum Dots, Aaron G. Midgett

Chemistry & Biochemistry Graduate Theses & Dissertations (1986-2018)

Providing affordable, clean energy is one of the major challenges facing society today, and one of the promising solutions is third generation solar energy conversion. Present day, first and second-generation solar cells can at most convert each absorbed photon into a single electron hole pair, thereby establishing a theoretical limit to the power conversion efficiency. The process of multiple exciton generation (MEG) in semiconductor quantum dots increases that theoretical efficiency from 33% to 42% by utilizing the excess energy of high energy photons that is otherwise wasted as heat to excite a second electron-hole pair, thereby boosting the potential photocurrent ...