Organic Photovoltaic Cells: Opportunities and Challenges

Singh, Mahendra Prasad; Amir, Mohd

doi:10.1007/978-981-19-0553-7_12

Cited by 2 publications

(4 citation statements)

References 232 publications

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“…Capture and escape rates of the shockley-readhall trap, with N t representing the trap density of a single carrier trap and f representing the fermi-dirac occupation probability [35]. transformation of all excitons into CTS before the possibility of diminishment due to exciton recombination comes into play [1,11,38,39,43].…”

Section: Dismentioning

confidence: 99%

“…Organic photovoltaic cells (OPVs) have emerged as a promising low-cost thin-film photovoltaic technology, offering several attractive features such as flexibility, solution processing, lightweight construction, and minimal material consumption during fabrication [1,2]. Over the past decade, the performance of OPVs has experienced significant advancements.…”

Section: Introductionmentioning

confidence: 99%

“…The advancement is attributed to the development of new molecular structures of organic semiconductors, improvements in morphology and interface engineering, innovative fabrication techniques, and refined device design [3][4][5][6][7][8]. Typically, the active layer of OPVs consists of a blend of two types of materials: a conjugated polymer (Donor) and a fullerene/non-fullerene compound (Acceptor) [1,2]. The blend of donor (D) and acceptor (A), commonly referred to as a bulk-heterojunction (BHJ), typically exhibits interlinked nanophases of D and A molecules with dimensions of around 20 nm [1,9].…”

Section: Introductionmentioning

confidence: 99%

“…Typically, the active layer of OPVs consists of a blend of two types of materials: a conjugated polymer (Donor) and a fullerene/non-fullerene compound (Acceptor) [1,2]. The blend of donor (D) and acceptor (A), commonly referred to as a bulk-heterojunction (BHJ), typically exhibits interlinked nanophases of D and A molecules with dimensions of around 20 nm [1,9]. Under illumination, bounded electron-hole pairs (excitons) are generated within BHJ [10].…”

Section: Introductionmentioning

confidence: 99%

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Extraction of charge transfer states dissociation probability and localised states parameters for PTB7-Th:PC71BM photovoltaic cells: using experimental J-V curves

Amir,

Singh

2024

Eng. Res. Express

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The efficient separation of bounded electron–hole pairs (excitons) through charge transfer states (CTS) is a fundamental process in organic photovoltaic cells (OPVs). Introduction of CTS dissociation probability CTS dis factor in the generation rate equations is a simple and effective method to estimate the number of dissociated CTS. In the present study, for a specified recombination coefficient (k), first we obtained the values of CTS dis and subsequently determined the localized states parameters, i.e., electron/hole trap densities, tail slopes, and trap cross sections within the active layer (PTB7-Th:PC71BM). In order to extract these values, the experimental data of dark/light J-V curves and the density of charge carriers at the electrodes are fitted using the downhill simplex algorithm. An iterative approach is used to obtain the converged values. Furthermore, we explored the effect of compositional variation on CTS dis and obtained values are 80%, 89%, 71%, and 57% for weight ratios of 1:1, 1:1.5, 1:2, and 1:2.5 respectively. All calculations and simulations are performed using OghmaNano.

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