Effects of Optical Interference and Annealing on the Performance of Polymer/Fullerene Bulk Heterojunction Solar Cells

Zhang, Chunfu; You, Hailong; Hao, Yue; Lin, Zhenhua; Zhu, Chunxiang

doi:10.5772/22097

Cited by 3 publications

(8 citation statements)

References 18 publications

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“…This result reveals the increasing of the photons absorption rate and the excitons mobility rate in the active layer. This result has been proved experimentally by C. Zhang and al [18] by considering the optical interference effect in the active layer and theoretically predicted by C. De Falco et al [20]. 34and Equation 35into Equation (22).…”

Section: Excitons Generation Rate Distribution In the Active Layersupporting

confidence: 61%

“…The quantity energy of incident light absorbed by active layer of an organic solar cell depends on the complex index of refraction n n ik = + of donor-acceptor materials [18]. The average energy dissipated per second for a given wavelength λ of incident light at the position z in the organic film can be calculated by:…”

Section: Excitons Generationmentioning

confidence: 99%

“…The light is treated as a propagating plane wave, which is transmitted and reflected on the interface. The complex reflection r ij and transmission t ij coefficients for a propagating plane wave along the surface normal between two adjacent layers j and k have been determined from Fresnel's theory by considering the effect of optical interference [18]. All these research have been experimentally based on the optical properties of the charge photogeneration.…”

Section: Introductionmentioning

confidence: 99%

“…Next, the influence of the Coulomb interaction between the electron and hole on the dissociation probability, the internal quantum efficiency, the binding energy distribution and efficiency of the excitons absorption have been analyzed and interpreted. The simulated results have been compared with those existing in the literature [18]- [20].…”

Section: Introductionmentioning

confidence: 99%

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Dynamic, Charge Photogeneration and Excitons Distribution Function in Organic Bulk Heterojunction Solar Cells

Madogni¹,

Yang²,

Kounouhéwa³

et al. 2015

OJAppS

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In this work, the excitons distribution function in organic bulk hetero junction solar cells, at a depth z has been determined from solving the charge continuity equation, by exploiting the Laplace transform with appropriate boundary conditions. Next, the influence of the electron-hole pair separation distance on the excitons dissociation probability, the internal quantum efficiency and the binding energy, has been studied. The simulated results show that the probability density of the carriers photo generated depends on the generation rate, excitons dissociation and the charge carriers in the cells. The potential improvement of the internal quantum efficiency of charge generation depends on electron-hole pair separation distance, the excitons dissociation probability into free charges and depends strongly on the optical absorption of the photons in the active layer.

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Section: Excitons Generation Rate Distribution In the Active Layersupporting

confidence: 61%

Section: Excitons Generationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dynamic, Charge Photogeneration and Excitons Distribution Function in Organic Bulk Heterojunction Solar Cells

Madogni¹,

Yang²,

Kounouhéwa³

et al. 2015

OJAppS

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show abstract

“…In this method, the cell is treated as a one-dimensional stack of homogeneous and isotropic layers with flat interfaces, and the number of photons absorbed in the active layer is obtained by calculating the time average of the energy dissipated per second in it. The detailed calculation processes are not presented here since the transfer matrix method is widely applied [10].…”

Section: Methologymentioning

confidence: 99%

Investigation of Organic Bulk Heterojunction Solar Cells from Optical Aspect

Zhang¹,

Hao²,

Chen³

et al. 2013

Solar Cells - Research and Application Perspectives

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Design of Ultrathin InP Solar Cell Using Carrier Selective Contacts

Raj

Rougieux

et al. 2020

IEEE J. Photovoltaics

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Most recently, III-V based ultra-thin solar cells have attracted much attention for their inherent advantages such as increased tolerance to defect recombination, efficient charge carrier separation, photon recycling, flexibility, and reduced material consumption. However, so far, almost all reported devices make use of conventional doped p-i-n kind of structures with a wide bandgap III-V lattice-matched epitaxial window layer, for passivation and reduced contact recombination. Here, we show that a high-efficiency device can be obtained utilizing an InP thin film of thickness as low as 280 nm, without the requirement of a conventional p-n homojunction or epitaxial window layer. This is achieved by utilizing a wide bandgap electron and hole selective contacts for electrons and holes transport, respectively. Under ideal conditions (assuming Interface Recombination Velocity (IRV) = 10 3 cm/s and bulk lifetime =1 us), the proposed solar cell structure can achieve efficiency as high as 28%. Although, in the presence of bulk and interface SRH recombination, the efficiency reduces, still for bulk minority carrier lifetime as low as 2ns and an IRV as high as 10 5 cm/s, an efficiency of ~22% can be achieved with InP thickness as low as 280 nm. The proposed device structure will be beneficial in cases where the growth of controlled p-n homojunction and window layer can be tedious as in case of low-cost deposition techniques, such as thin-film vapour-liquidsolid (TF-VLS) and close-spaced vapour transport (CSVT).

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Effects of Optical Interference and Annealing on the Performance of Polymer/Fullerene Bulk Heterojunction Solar Cells

Cited by 3 publications

References 18 publications

Dynamic, Charge Photogeneration and Excitons Distribution Function in Organic Bulk Heterojunction Solar Cells

Dynamic, Charge Photogeneration and Excitons Distribution Function in Organic Bulk Heterojunction Solar Cells

Investigation of Organic Bulk Heterojunction Solar Cells from Optical Aspect

Design of Ultrathin InP Solar Cell Using Carrier Selective Contacts

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