TY  - JOUR
AV  - none
SP  - 1119
TI  - Enhancement of organic solar cell efficiency by altering the zinc oxide photoanode nanostructure morphology
N1  - cited By 4
PB  - Springer Medizin
SN  - 20089244
EP  - 1130
ID  - scholars16161
N2  - The current paper examines the effects of zinc oxide nanostructure configurations, as photo-anode formations of organic solar cells, on the performance of power conversion. To this end, some experiments were conducted during which a near band edge emission red shift of ~ 0.11 eV from nanoparticles to vertically oriented nano-rods was observed. This bandgap narrowing promotes transferring of photo-excited electrons towards the conduction band of photo-anode. A ~ 48 decrease in the deep level emission intensity revealed a smaller non-radiative waves emission due to lower level of crystal disorder. Using vertically oriented zinc oxide nanorods as photo-anodes, the photovoltaic efficiency of the organic solar cell improved considerably. The nano-rod-structured photo-anodes showed a 0.22 V rise in the open-circuit voltage, from 0.76 to 0.98 V, and a 2.08 times increment in the overall conversion performance, compared to the zinc oxide nanoparticle-structured photo-anodes. This superior performance is attributed to a greater chance of charge recombination and light-trapping in the cells, more efficient light absorption, and high level of crystallinity that grants easier electron mobility for vertically oriented zinc oxide nanorods. Moreover, a lower charge-transfer resistance (0.85 Ω) was achieved due to better electro-catalytic action for oxygen reduction for vertical nanorods compared to the other two zinc oxide configurations (1.62 Ω and 4.06 Ω). This boosted the cell performance by increasing the short-circuit current density (JSC). The fabricated solar cell may contribute to sustainable and environmentally friendly electricity generation process through reducing the consumption of non-renewable energy sources. © 2021, The Author(s), under exclusive licence to Islamic Azad University.
IS  - 6
Y1  - 2022///
VL  - 12
A1  - Samavati, Z.
A1  - Samavati, A.
A1  - Ismail, A.F.
A1  - Borhani, T.N.
A1  - Velashjerdi, M.
A1  - Eisaabadi, B.G.
A1  - Rostami, A.
A1  - Othman, M.H.D.
A1  - Awang, A.
JF  - Journal of Nanostructure in Chemistry
UR  - https://www.scopus.com/inward/record.uri?eid=2-s2.0-85127489479&doi=10.1007%2fs40097-021-00453-2&partnerID=40&md5=b8a918c336a579457b5358af071d4592
ER  -