Organic Solar Cells

Nageswar, Y. V. D.; Rao, V. Jayathirtha

doi:10.1002/9781119725022.ch1

Cited by 2 publications

(1 citation statement)

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“…12 Over the last 30 years, several attempts have been undertaken to boost the percentage conversion efficiency (PCE) of OSCs by both computational and experimental researchers as a result of which, a net PCE of up to 19% has been achieved. 13 Fullerenes have been applied in OSCs to form a conjugated system to heighten charge mobility. [14][15][16] The fullerene acceptors do have certain hitches, such as low solar absorption, non-tunable energy levels, limited electronic property changes, poor morphology, and structural instability that might limit an OSC's PCE by up to 11%.…”

Section: Introductionmentioning

confidence: 99%

A DFT approach toward designing selenophene‐based unfused small molecule acceptors by end‐capped modification for improving the photovoltaic performance of organic solar cells

Rukhsar,

Waqas,

Akhter

et al. 2023

J of Physical Organic Chem

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In this study, we have developed a series of eight non‐fullerene acceptors, constituting A‐D‐A type small molecules named (SS1–SS8) to enlighten the open‐circuit voltage (Voc) and the efficacy of pre‐existed SR (reference) molecule. Density functional theory has been adopted to computationally assess the optoelectronic features of fabricated molecules with the B3LYP/6‐31G (d, p) level of theory. Several factors like charge transfer, light absorption, binding energy, dipole moment, and reorganization energy are studied. The frontier orbitals analysis revealed that all the newly developed molecules have less bandgap (ranging from 1.97 to 2.22 eV) than SR (2.23 eV). Similarly, these newly engineered molecules also revealed better light absorption by screening remarkable redshift from 676.23 to 789.28 nm than SR (673.83 nm) in chloroform. These molecules have remarkably reduced excitation energy ranging from 1.71 to 1.83 eV than SR 1.84 eV. The exclusive CT analysis is carried out via J61:SS8 complex because of the higher Voc of SS8 (acceptor). Additionally, SS8 has shown the least energy loss, making it a strong contender to be used to develop improved OSCs. Because of the exceptionally improved characteristics, these newly engineered molecules (especially SS8) can be considered potential aspirants for fabricating proficient OSCs.

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