[Pw_forum] carrier lifetime, diffusion length, mobility (HASSAN AHMOUM)

[Abdullah N. Albarakati]

Dear Eduardo Menendez,

Thank you very much,

so far, I follow your recommendation and I will feedback with my finding,

Best wishes,
________________________________
From: pw_forum-bounces at pwscf.org [pw_forum-bounces at pwscf.org] on behalf of Eduardo Menendez [eariel99 at gmail.com]
Sent: Thursday, February 16, 2017 3:40 PM
To: pw_forum at pwscf.org
Subject: Re: [Pw_forum] carrier lifetime, diffusion length, mobility (HASSAN AHMOUM)

Dear all,
The mentioned equations are just for for ZnO, and they use some experimental values of the conductivity. However, the method can be replicated for other II-VI or III-V compounds. I would not dare to replicate it for a different class of material.

Computing directly the carrier lifetime is mainly a matter of eletron-phonon interactions and electron-defect interaction, and electron-hole recombination. All of them could be done with the help of Quantum ESPRESSO, using auxiliary codes, but I do not know any implementation to do it.
I hope someone  hast and cat share it.

Eduardo Menendez-Proupin


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From: HASSAN AHMOUM <h.ahmoum at gmail.com<mailto:h.ahmoum at gmail.com>>
To: pw_forum at pwscf.org<mailto:pw_forum at pwscf.org>
Cc:
Date: Wed, 15 Feb 2017 16:10:10 +0100
Subject: Re: [Pw_forum] carrier lifetime, diffusion length, mobility
Dear Abdullah

Yes you can calculate  indirectly all this parameter's by using Boltztrap code.

Boltztrap give you as output file ( carrier concentration, conductivity/carrier lifetime)

so by using this equation [1] you can calculate carrier lifetime

[1]:K.P.Ong, D.J.Singh, P.Wu, Phys. Rev. B 83 (2011) 115110.

   carrier lifetime=2.53*(10^-5)*(T^-1)*(n^(-1/3))      [1]

were T:temperatur, n: carrier concentration.

and if u want calculate mobility use this equation :

      mobility=conductivity/(charge elementaire*carrier concentration)

i think if you have this parameters you can calculate diffusion length.






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