دانلود مقاله نانو با عنوان طیف های نوار پهن الکترون های داغ و حفرات در نقاط کوانتومی PbSe
Broadband Cooling Spectra of Hot Electrons and Holes in PbSe Quantum Dots
Understanding cooling of hot charge carriers in semiconductor quantum dots (QDs) is of fundamental interest and useful to enhance the performance of QDs in photovoltaics. We study electron and hole cooling dynamics in PbSe QDs up to high energies where carrier multiplication occurs. We characterize distinct cooling steps of hot electrons and holes and build up a broadband cooling spectrum for both charge carriers. Cooling of electrons is slower than of holes. At energies near the band gap we find cooling times between successive electronic...
دانلود رایگان مقاله نانو Plasmon-Enhanced Energy Transfer in Photosensitive Nanocrystal Device
Plasmon-Enhanced Energy Transfer in Photosensitive Nanocrystal Device
Shahab Akhavan†§#, Mehmet Zafer Akgul†∥#, Pedro Ludwig Hernandez-Martinez†‡#, and Hilmi Volkan Demir*†‡
† UNAM−Institute of Materials Science and Nanotechnology, Department of Electrical and Electronics Engineering and Department of Physics, Bilkent University, Ankara 06800, Turkey
‡ LUMINOUS! Center of Excellence, School of Electrical and Electronic Engineering and School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 639798, Singapore