Macho Anani

13 Questions 21 Answers 0 Followers

Questions related from Macho Anani

What would be the appearance of different colors below the ultraviolet and beyond the infrared?

There is an infinity of colors below purple and beyond red, but what would be their appearance if we could "see" them?

12 December 2017 8,281 6 View

"Publish or perish" seems to be the slogan "in vogue", but is there another emergency exit ?

People have to publish in a factor impacted journal, but the must high quoted ones hardly accept non experimental works. What have a pure theorician to do, then in order to overcome this difficulty ?

02 February 2017 5,107 1 View

If none of the Shockley and Queisser suppositions were necessarily true, how could we significantly improve their limit?

The analysis of Shockley and Queisser relied on hypothesis that only one electron-hole was created per incoming photon, there is a thermal relaxation of the electron-hole pair energy in excess of...

02 February 2015 5,819 2 View

Could we make very efficient optical waveguides on semiconductors ?

We have previously developped a theoretical optical waveguide using a III-Nitrides substrate, but we nevertheless didn't find a lot of literature about this kind of waveguides.

01 January 2015 3,936 4 View

Why is that the best band gap of a solar cell is in the region of 1.5 eV?

In several papers I found that the optimized band gap for solar cells is close to 1.5 eV. This value corresponds to a wavelength of about 830 nm, in infrared. Is it due to the fact that we use...

12 December 2014 1,473 18 View

In Schottky diodes, how could we explain, physically, the barrier inhomogeneities ?

In Schottky diodes appears at metal/Semiconductor interface some inhomogeneities in the barrier.

12 December 2014 3,070 5 View

Why don't we use specific bacterias to produce hydrocarbons from atmospheric carbon dioxide ?

There are, like superior plants, a lot of species of bacterias which could use atmospheric Carbon Dioxide to make hydrocarbons, so why don't we investigate this way of resolving the fateful...

12 December 2014 715 1 View

If the polar ice caps would melt more, resulting in an erection of the underlying landmasses, would this not accelerate the elevation of sea levels?

The polar ice caps rely on continental masses sinking them into the earth's crust. If the ice melts quickly, did it would not occur a sudden acceleration of the sea level elevation (estimated at...

08 August 2014 9,002 6 View

Could the atmosphere reflect more sun radiations since the GHGs concentration has risen?

Since the Greenhouse Gases concentration has greatly augmented, could the climate changing be counterbalanced by reflecting more solar radiations like a volcano with its ashes cloud can do?

07 July 2014 4,114 15 View

How can we explain the barrier height inhomogeneity in Schottky contact?

Some researchers proposed to use gaussian. What about other solutions?

03 March 2014 7,984 4 View

What are the reasons that make the GaN p-doping very difficult or even impossible to achieve?

GaN is nowadays a very important semiconductor, nevertheless it suffers from it's inability to be p-doped with appropriate acceptor.

03 March 2014 8,774 2 View

In Schottky Diode did linear relationship between barrier height and ideality factor give support for presence of thermionic emission as predominant?

In the first approach we thought that it is due to the presence of interfacial states in the diode?

02 February 2014 7,023 3 View

Did anyone heard about successful n-doping GaN in scientific literature?

It seems to be very hard to n-dope GaN.

02 February 2014 1,731 1 View