Temperature-dependent barrier height inhomogeneities in PTB7:PC71BM-based organic solar cells

Brahim Ait Ali; Reda Moubah; Abdelkader Boulezhar; Hassan Lassri

doi:10.1088/1674-1056/aba5fc

Journals >Chinese Physics B >Volume 29 >Issue 9 >Page > Article

Chinese Physics B
Vol. 29, Issue 9, (2020)

Temperature-dependent barrier height inhomogeneities in PTB7:PC₇₁BM-based organic solar cells

Brahim Ait Ali^1、2, Reda Moubah^2、†, Abdelkader Boulezhar¹, and Hassan Lassri²

Author Affiliations

¹LERDyS, Faculty of Science Ain Chock, Hassan II University of Casablanca, Morocco

²LPMMAT, Faculty of Science Ain Chock, Hassan II University of Casablanca, Morocco

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DOI: 10.1088/1674-1056/aba5fc Cite this Article

Brahim Ait Ali, Reda Moubah, Abdelkader Boulezhar, Hassan Lassri. Temperature-dependent barrier height inhomogeneities in PTB7:PC₇₁BM-based organic solar cells[J]. Chinese Physics B, 2020, 29(9): Copy Citation Text

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Fig. 1. (a) Chemical structures of components in active layer and (b) device structure.

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(a) log(J)–V (voltage) of PTB7:PC71BM-based device in the dark, and (b) the J–V characteristics under illumination in temperature range of 110 K–325 K.

Fig. 2. (a) log(J)–V (voltage) of PTB7:PC₇₁BM-based device in the dark, and (b) the J–V characteristics under illumination in temperature range of 110 K–325 K.

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Fig. 3. Plot of n and J_sversus temperature (extracted from J–V curves in the dark) of the investigated device at various temperatures.

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Fig. 4. Variations of (a) V_OC and J_SC, (b) PCE ( %) and fill factor (FF) with temperature of the investigated device.

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Fig. 5. Barrier height versusT of the investigated device.

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Fig. 6. The plots of ln (J_s/T²) as a function of 1/T [panel (a)] and 1/nT [panel (b)].

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Fig. 7. Barrier height versus 1/2kT of the investigated device.

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Fig. 8.

ln(Js/T2)−σs2/(2k2T2)

versus 1/kT of the investigated device.

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Cathode	Ca/Al
Temperature range	${\hat{Φ}}_{B 0}$ /eV	A^*/A⋅cm⁻²⋅K⁻²
High (200 K–325 K)	1.49	135.64
Low (110 K–170 K)	0.91	169.01

Table 1. The

{\hat{Φ}}_{B 0}

(in unit eV) and A^* (in unit A⋅cm⁻⋅K⁻²) obtained from Eq. (9).

Brahim Ait Ali, Reda Moubah, Abdelkader Boulezhar, Hassan Lassri. Temperature-dependent barrier height inhomogeneities in PTB7:PC₇₁BM-based organic solar cells[J]. Chinese Physics B, 2020, 29(9):

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