Abstract
Bulk heterojunction organic solar cells with four different Urbach’s tail width energies (E U ) are simulated, and the combined influence of E U and charge carrier mobility on the short circuit current (J sc ) , open circuit voltage (V oc ) , fill factor (FF), power conversion efficiency (PCE), Langevin and tail state recombination is investigated. The results show that J sc decreases more drastically with increasing E U in the lower mobility range and then asymptotically converges to a single value in the large mobility range. Likewise, with the increase in mobility, V oc decreases nearly linearly with different slopes depending on different E U in the lower mobility range and then different slopes converge to a single slope in the larger mobility range. Thus, V oc becomes E U independent in the higher mobility range. Furthermore, it is found that by increasing E U , the maximum values of FF and PCE shift towards the higher mobility range. It is shown that the influence of combined optimization of E U and mobility enhances both FF and PCE, but its effect on FF is much more significant than that on PCE.
| Original language | English |
|---|---|
| Pages (from-to) | 10064-10072 |
| Number of pages | 9 |
| Journal | Journal of Materials Science: Materials in Electronics |
| Volume | 30 |
| Issue number | 11 |
| Early online date | 14 May 2019 |
| DOIs | |
| Publication status | Published - Jun 2019 |
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Combined influence of Urbach’s tail width energy and mobility of charge carriers on the photovoltaic performance of bulk heterojunction organic solar cells. / Mehdizadeh-Rad, Hooman; Singh, Jai.
In: Journal of Materials Science: Materials in Electronics, Vol. 30, No. 11, 06.2019, p. 10064-10072.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - Combined influence of Urbach’s tail width energy and mobility of charge carriers on the photovoltaic performance of bulk heterojunction organic solar cells
AU - Mehdizadeh-Rad, Hooman
AU - Singh, Jai
PY - 2019/6
Y1 - 2019/6
N2 - Bulk heterojunction organic solar cells with four different Urbach’s tail width energies (E U ) are simulated, and the combined influence of E U and charge carrier mobility on the short circuit current (J sc ) , open circuit voltage (V oc ) , fill factor (FF), power conversion efficiency (PCE), Langevin and tail state recombination is investigated. The results show that J sc decreases more drastically with increasing E U in the lower mobility range and then asymptotically converges to a single value in the large mobility range. Likewise, with the increase in mobility, V oc decreases nearly linearly with different slopes depending on different E U in the lower mobility range and then different slopes converge to a single slope in the larger mobility range. Thus, V oc becomes E U independent in the higher mobility range. Furthermore, it is found that by increasing E U , the maximum values of FF and PCE shift towards the higher mobility range. It is shown that the influence of combined optimization of E U and mobility enhances both FF and PCE, but its effect on FF is much more significant than that on PCE.
AB - Bulk heterojunction organic solar cells with four different Urbach’s tail width energies (E U ) are simulated, and the combined influence of E U and charge carrier mobility on the short circuit current (J sc ) , open circuit voltage (V oc ) , fill factor (FF), power conversion efficiency (PCE), Langevin and tail state recombination is investigated. The results show that J sc decreases more drastically with increasing E U in the lower mobility range and then asymptotically converges to a single value in the large mobility range. Likewise, with the increase in mobility, V oc decreases nearly linearly with different slopes depending on different E U in the lower mobility range and then different slopes converge to a single slope in the larger mobility range. Thus, V oc becomes E U independent in the higher mobility range. Furthermore, it is found that by increasing E U , the maximum values of FF and PCE shift towards the higher mobility range. It is shown that the influence of combined optimization of E U and mobility enhances both FF and PCE, but its effect on FF is much more significant than that on PCE.
UR - http://www.scopus.com/inward/record.url?scp=85065986523&partnerID=8YFLogxK
U2 - 10.1007/s10854-019-00868-2
DO - 10.1007/s10854-019-00868-2
M3 - Article
VL - 30
SP - 10064
EP - 10072
JO - Journal of Materials Science: Materials in Electronics
JF - Journal of Materials Science: Materials in Electronics
SN - 0957-4522
IS - 11
ER -