TRPL-PVK

Matlab implementation for the determination of carrier (electron or hole) diffusion coefficient (diffusion length) using transient photoluminescence decay or time resolved photoluminescence (TRPL) experimental data. Diffusion coefficient is obtained by the sum squared error minimization procedure between the theoretical curve obtained from the one-dimensional finite element diffusion model and the experimental decay.

Code and data from paper "Effect of Mesostructured Layer upon Crystalline Properties and Device Performance on Perovskite Solar Cells" J. Phys. Chem. Lett. 2015, 6, 1628-1637. See Support information file of the paper for details in this implementation.

Dependencies:

• Matlab (used version R2012b)

Usage

The procedure consist of three steps:

1. Determination of β_s and τ_s parameters guessing a stretched exponential decay for TRPL data of blocked device (natural recombination without extraction layer). Run stretched_exponential_fitting.m routine in the 1_recombination_blocked_device folder using a TRPL normalized experimental data in the same format as block_device_data.csv data file. Grab the output β_s and τ_s values for the next step.

2. Determination of diffusion coefficient. Open minimization_proc.m in folder 2_diffusion_coeficient and set beta;_s and τ_s parameters as obtained in step 1. TRPL experimental data obtained from device containing quenched layer (hole or electron extraction layer) is included normalized in the quenched_device_data.csv file. Run minimization_proc.m. See comments in main routine main_diffusion_funk.m to study the implementation done here and another options as illumination and quenched side position.

3. Diffusion Length is obtained using β_s and τ_s parameters from step 1 and D coefficient from step 2. Run Diffusion_Length.m to obtain the diffusion length (nm)

Citation

If you find this work useful for your research, please cite:

A. Listorti, E. J. Juarez-Perez, C. Frontera, V. Roiati, L. Garcia-Andrade, S. Colella, A. Rizzo, P. Ortiz, I. Mora-Sero, Effect of Mesostructured Layer upon Crystalline Properties and Device Performance on Perovskite Solar Cells" J. Phys. Chem. Lett. 2015, 6, 1628-1637.

@Article{Listorti2015Effect1628,
  Title                    = {Effect of Mesostructured Layer upon Crystalline Properties and Device Performance on Perovskite Solar Cells},
  Author                   = {Listorti, Andrea and Juarez-Perez, Emilio J. and Frontera, Carlos and Roiati, Vittoria and Garcia-Andrade, Laura and Colella, Silvia and Rizzo, Aurora and Ortiz, Pablo and Mora-Sero, Ivan},
  Journal                  = {J. Phys. Chem. Lett.},
  Pages                    = {1628--1637},
  Volume                   = {6},
  Year                     = {2015},
  Doi                      = {10.1021/acs.jpclett.5b00483},
}

Contact

Feel free to contact me here in github if there is any question or by email (remove white spaces in email address)

e j juarez perez (at) gmail.co m