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Questions related from Zhanhao Hu
Usually HOPG is used for calibrating Kelvin probe tip work-function. However I found if operated in the air, HOPG surface will quickly adsorb air species and the measured contact potential drifts...
04 April 2019 3,922 4 View
I want to calibrate the work-function of our Kelvin probe using HOPG as a reference sample. For the commonly used SPI HOPG, there are three grades, SPI-1, SPI-2 and SPI-3. Is there any difference...
04 April 2019 9,845 4 View
I wonder if anyone has kept a record of the reported mobility of organic field effect transistors. And what is the highest value of hole and electron mobilities to date, for small molecule and...
03 March 2017 3,329 1 View
I have been using the ultraviolet photoemission spectroscopy (UPS) to look at the energy levels of quantum dots. My quantum dot has a core/shell structure, where the shell is supposed to have a...
10 October 2016 313 4 View
Most core/shell structured quantum dots (e.g. CdSe/CdZnS) today employ oleic acids as the passivating ligands. But can they be easily substituted for other types of organic ligands? Is there any...
10 October 2016 2,584 2 View
For a core-shell quantum dot, the band edges of the core and shell are different. How can I measure the energy levels?
09 September 2016 5,768 3 View
I want to spray-coat thin films from organic semiconducting or metallic inks. Can I use a spray gun for painting cars for this purpose? Since I'd like to start from spraying small-size devices...
08 August 2016 3,064 4 View
I wonder, what 'big questions' one can ask in the field of organic solar cells. Alternatively, what are the major challenges? No matter if it is about physics, chemistry, processing, etc.
05 May 2016 6,033 0 View
