17 Questions 37 Answers 0 Followers
Questions related from Amr Hessein
I want to make modeling and simulation for thin film solar cell and thin film interfaces composed from nano structured materials. But I don't have any experience in that field. So any one can...
12 November 2016 1,365 72 View
I want to make thermal reduced graphene oxide RGO from graphite oxide prepared by modifies Hummer's method. How can do the exfoliation and what is the procedure to perform the thermal reduction...
09 November 2015 9,142 7 View
usually SILAR process for deposition CdSe QDs on TiO2 mesoporous layer is performed under inert atmosphere in glove box. But, I am looking for a method to make it in open air. So can any one...
20 October 2015 9,022 0 View
18 October 2015 2,501 1 View
I want to exfoliate Graphite oxide prepared with Hummer's method into Graphene oxide using sonication. So, can anyone tell me what are suithe best sonication power and frequency should I use? Is...
14 October 2015 8,225 5 View
I made my counter electrode from nickel sulfide- Graphene composite on FTO substrate by using PVDF as a binder. But when the QDSSCs assembled by using polysulfide electrolyte, the counter...
02 October 2015 5,266 2 View
I used to prepare Graphene coating by mixing 50 mg Graphene and 5 mg PVDF in 3 ml NMP to be coated on FTO substrate. Recently, After drying the film contains many cracks and became easily removed...
09 June 2015 2,351 7 View
Can any one suggest the suitable filter paper used in filtering and washing graphene oxide prepared by Hummer's method.
24 May 2015 5,437 5 View
I need to get a light source that simulate the sunlight in order to test my samples. Can I use "400 W metal halide lamp" or " Halogen lamp" is better?
16 April 2015 2,655 15 View
I want to know the typical procedure for preparing (Na2SeSO3), to be used in assembling CdSe by SILAR method.
01 February 2015 4,864 4 View
I need to use Filmetrics F20 (http://www.filmetrics.com/thicknessmeasurement/f20) to measure the thickness of tio2 layer coated on FTO glass used as a working electrode in dye sensitized solar...
27 October 2014 5,302 3 View
I working on developing a counter electrode of sensitized solar cell based on graphene. And I need to perform EIS of these electrodes. In the literature, the authors perform EIS of cells consist...
19 October 2014 8,870 10 View
Alternative to the unstable sodium sulfide + sulfur in water + methanol one?
11 October 2014 8,596 1 View
I need to measure the thin film thickness of mesoporous TiO2 layer using "filmetrics F20 thin film analyzer" but I want to know the refractive index of TiO2 P25
09 September 2014 6,872 4 View
To whom work in quantum dot sensitized solar cell. I prepare polysulfide electrolyte with concentration 1M Na2S and 1M S in distilled water. My problem is after some time I found a green...
24 August 2014 2,967 2 View
My problem is it still soluble in water after hydrazine treatment.
14 May 2014 2,450 4 View
The resistance value is variable by changing the current value of the same measured point.
17 March 2014 1,261 7 View
