Commit f2d12a42 authored by Paul Schütze's avatar Paul Schütze
Browse files

Merge branch 'srh_temperature' into 'master' 

Recombination: add Temperature Scaling of SRH Lifetime

See merge request allpix-squared/allpix-squared!681
parents 072f1973 65609806

doc/usermanual/chapters/models.tex

+9 −3
Original line number Diff line number Diff line
@@ -289,7 +289,7 @@ The lifetime is calculated using the Shockley-Read-Hall relation as given by~\ci 
    \tau(N) = \frac{\tau_0}{1 + \frac{N}{N_{d0}}}

\end{equation}

where $\tau_0$ and $N_{d0}$ are reference lifetime and doping concentration, for electrons and holes respectively.

The parameter values implemented in \apsq are taken from~\cite{fossum} as:

The parameter values implemented in \apsq are taken from~\cite{fossum-lee} and the Synopsys Sentaurus TCAD software manual as:

\begin{equation*}

    \begin{split}

        \tau_{0,e} &= \SI{1e-5}{s} \\
@@ -297,11 +297,17 @@ The parameter values implemented in \apsq are taken from~\cite{fossum} as: 
    \end{split}

    \qquad

    \begin{split}

        \tau_{0,e} &= \SI{4.0e-4}{s} \\

        N_{d0,e}   &= \SI{7.1e15}{\per \cubic \cm} \\

        \tau_{0,h} &= \SI{4.0e-4}{s} \\

        N_{d0,h}   &= \SI{7.1e15}{\per \cubic \cm} \\

    \end{split}

\end{equation*}



The temperature dependence of the Shockley-Read-Hall lifetime is scaled following the low-temperature approximation model presented in~\cite{schenk} as:



\begin{equation}

    \tau(N, T) = \tau(N) \left( \frac{\SI{300}{K}}{T} \right)^{3/2}

\end{equation}



This model can be selected in the configuration file via the parameter \parameter{recombination_model = "srh"}.



\subsection{Auger Recombination}

doc/usermanual/references.bib

+24 −0
Original line number Diff line number Diff line
@@ -526,6 +526,30 @@ month={Aug}, 
  author = "Jerry G. Fossum",

}



@article{FOSSUM1983569,

	title = {Carrier recombination and lifetime in highly doped silicon},

	journal = {Solid-State Electronics},

	volume = {26},

	number = {6},

	pages = {569-576},

	year = {1983},

	issn = {0038-1101},

	doi = {https://doi.org/10.1016/0038-1101(83)90173-9},

	author = {J.G. Fossum and R.P. Mertens and D.S. Lee and J.F. Nijs},

}

@article{schenk,

  title = {A model for the field and temperature dependence of Shockley-Read-Hall lifetimes in silicon},

  journal = {Solid-State Electronics},

  volume = {35},

  number = {11},

  pages = {1585-1596},

  year = {1992},

  issn = {0038-1101},

  doi = {https://doi.org/10.1016/0038-1101(92)90184-E},

  url = {https://www.sciencedirect.com/science/article/pii/003811019290184E},

  author = {A. Schenk},

}



@article{haug,

  title = "Auger coefficients for highly doped and highly excited semiconductors",

  journal = "Solid State Communications",

src/modules/GenericPropagation/GenericPropagationModule.cpp

+1 −5
Original line number Diff line number Diff line
@@ -562,11 +562,7 @@ void GenericPropagationModule::initialize() { 
    mobility_ = Mobility(config_, detector->hasDopingProfile());



    // Prepare recombination model

    try {

        recombination_ = Recombination(config_.get<std::string>("recombination_model"), detector->hasDopingProfile());

    } catch(ModelError& e) {

        throw InvalidValueError(config_, "recombination_model", e.what());

    }

    recombination_ = Recombination(config_, detector->hasDopingProfile());

}



void GenericPropagationModule::run(Event* event) {

src/modules/GenericPropagation/tests/03-lifetime.conf

+1 −1
Original line number Diff line number Diff line
@@ -31,4 +31,4 @@ propagate_electrons = false 
propagate_holes = true

recombination_model = "srh_auger"



#PASS Recombined 6 charges during transport
 
#PASS Recombined 4 charges during transport

src/modules/ProjectionPropagation/ProjectionPropagationModule.cpp

+1 −5
Original line number Diff line number Diff line
@@ -84,11 +84,7 @@ void ProjectionPropagationModule::initialize() { 
    }



    // Prepare recombination model

    try {

        recombination_ = Recombination(config_.get<std::string>("recombination_model"), detector_->hasDopingProfile());

    } catch(ModelError& e) {

        throw InvalidValueError(config_, "recombination_model", e.what());

    }

    recombination_ = Recombination(config_, detector_->hasDopingProfile());



    if(detector_->hasMagneticField() && !config_.get<bool>("ignore_magnetic_field")) {

        throw ModuleError("This module should not be used with magnetic fields. Add the option 'ignore_magnetic_field' to "