TY - GEN
T1 - Influence of the recombination mechanism via band tails on the electric performance of a bulk heterojunction solar cell
AU - Hernández, Liliana F.
AU - Cabrera, Víctor
AU - Reséndiz, Luis M.
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2014
Y1 - 2014
N2 - Trap assisted recombination via tail states model was simulated and the results were compared with those obtained from direct recombination model. It is shown that the dark ideality factor of the first one depends directly on both the Urbach energies and charge carrier capture coefficients. These parameters were directly related to the loss of efficiency in organic solar cells. When either one of capture coefficients or Urbach energies increase, the density of traps increases as well, and solar cell ideality factor deviates from 1 to 2. On the contrary, the ideality factor is close to unity as long as the density of states is low, in such case the recombination becomes band to band type. Under our assumptions, the dark ideality factor is influenced by trap assisted recombination model and under illumination, solar cell parameters are strongly reduced by trap assisted model via band tails recombination as we will demonstrate in our results.
AB - Trap assisted recombination via tail states model was simulated and the results were compared with those obtained from direct recombination model. It is shown that the dark ideality factor of the first one depends directly on both the Urbach energies and charge carrier capture coefficients. These parameters were directly related to the loss of efficiency in organic solar cells. When either one of capture coefficients or Urbach energies increase, the density of traps increases as well, and solar cell ideality factor deviates from 1 to 2. On the contrary, the ideality factor is close to unity as long as the density of states is low, in such case the recombination becomes band to band type. Under our assumptions, the dark ideality factor is influenced by trap assisted recombination model and under illumination, solar cell parameters are strongly reduced by trap assisted model via band tails recombination as we will demonstrate in our results.
KW - Band tail states model
KW - Bulk heterojunction solar cell
KW - Cell parameters
KW - Ideality factor
KW - Recombination mechanism
UR - http://www.scopus.com/inward/record.url?scp=84938794987&partnerID=8YFLogxK
U2 - 10.1109/ICEEE.2014.6978322
DO - 10.1109/ICEEE.2014.6978322
M3 - Contribución a la conferencia
AN - SCOPUS:84938794987
T3 - 2014 11th International Conference on Electrical Engineering, Computing Science and Automatic Control, CCE 2014
BT - 2014 11th International Conference on Electrical Engineering, Computing Science and Automatic Control, CCE 2014
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2014 11th International Conference on Electrical Engineering, Computing Science and Automatic Control, CCE 2014
Y2 - 29 September 2014 through 3 October 2014
ER -