Improved performance of organic solar cells by incorporating silica-coated silver nanoparticles in the buffer layer

Yang, Hao; Song, Jing-Cheng; Yang, Fan; Hao, Yuying; Sun, Qinjun; Guo, Junjie; Cui, Yanxia; Wang, Hua; Zhu, Furong

doi:10.1039/c4tc01990c

Cited by 52 publications

(37 citation statements)

References 35 publications

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“…Apparently, G max of the P(NDI2OD‐FT2)‐based device is 15% higher than that of the P(NDI2OD‐T2)‐based one (Table ), which can be attributed to the extended light absorption range of the PBDTT‐TT‐F:P(NDI2OD‐FT2) blend. From the estimated G max , the exciton dissociation probability, P ( E , T ), can be determined by J ph = q·G max ·P ( E , T ) ·L because only a portion of photogenerated excitons are dissociated into holes and electrons in polymer solar cells . When the normalized photocurrent density ( J ph / J sat ) was plotted against V eff to evaluate the P ( E , T ) of the device, as shown in the inset of Figure c, it clearly demonstrates that the PBDTT‐TT‐F:P(NDI2OD‐FT2) blend generates more free charge carriers than PBDTT‐TT‐F:P(NDI2OD‐T2) blend under bias, which verifies its superior exciton quenching efficiency and charge generation capability.…”

Section: Methodsmentioning

confidence: 92%

Fluoro‐Substituted n‐Type Conjugated Polymers for Additive‐Free All‐Polymer Bulk Heterojunction Solar Cells with High Power Conversion Efficiency of 6.71%

et al. 2015

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Section: Methodsmentioning

confidence: 92%

Fluoro‐Substituted n‐Type Conjugated Polymers for Additive‐Free All‐Polymer Bulk Heterojunction Solar Cells with High Power Conversion Efficiency of 6.71%

et al. 2015

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“…Their effect on the device V oc is weaken with the change of their location. In contrast, when Au BPs and ZnO closely contact, the hot electrons may trigger the “dopant level” in ZnO layer, leading to improved interface and conductivity of the ZnO layer . It should be difficult for the hot electrons to tunnel through the silica layer.…”

Section: Characteristics Of Devices With Au Bps@sio2 and Au Nss@sio2mentioning

confidence: 99%

Broadband Enhancement of PbS Quantum Dot Solar Cells by the Synergistic Effect of Plasmonic Gold Nanobipyramids and Nanospheres

Chen

Wang

Liu

et al. 2017

Advanced Energy Materials

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For the first time, the plasmonic gold bipyramids (Au BPs) are introduced to the PbS colloidal quantum dot (CQD) solar cells for improved infrared light harvesting. The localized surface plasmon resonance peaks of Au BPs matches perfectly with the absorption peaks of conventional PbS CQDs. Owing to the geometrical novelty of Au BPs, they exhibit significantly stronger far‐field scattering effect and near‐field enhancement than conventional plasmonic Au nanospheres (NSs). Consequently, device open‐circuit voltage (Voc) and short‐circuit current (Jsc) are simultaneously enhanced, while plasmonic photovoltaic devices based on Au NSs only achieve improved Jsc. The different effects and working mechanisms of these two Au nanoparticles are systematically investigated. Moreover, to realize effective broadband light harvesting, Au BPs and Au NSs are used together to simultaneously enhance the device optical and electrical properties. As a result, a significantly increased power conversion efficiency (PCE) of 9.58% is obtained compared to the PCE of 8.09% for the control devices due to the synergistic effect of the two plasmonic Au nanoparticles. Thus, this work reveals the intriguing plasmonic effect of Au BPs in CQD solar cells and may provide insight into the future plasmonic enhancement for solution‐processed new‐generation solar cells.

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“…3(a) and 3(b)]. It is reasonable to infer that the surface modification by Au@SiO 2 NRs could introduce the so-called dopant levels 25,39 within the band gap of PEDOT:PSS, resulting in a decrease in the energy barrier at the PEDOT:PSS/BHJ interface, thereby improving hole extraction. The small increase in V oc has also been reported in some published works 51,55 which similarly introduced plasmonic NPs at the buffer/active interface, but little attention has been paid on it.…”

Section: Resultsmentioning

confidence: 99%

Efficiency enhancement in organic solar cells by incorporating silica-coated gold nanorods at the buffer/active interface

et al. 2015

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The performance of organic solar cells (OSCs) can be greatly improved by incorporating silica-coated gold nanorods (Au@SiO 2 NRs) at the interface between the hole transporting layer and the active layer due to the plasmonic effect. The silica shell impedes the aggregation effect of the Au NRs in ethanol solution which otherwise would bring forward serious reduction in the open circuit voltage when incorporating the Au NRs at the buffer/active interface. As a result, while the high open circuit voltage being demonstrated, the optimized plasmonic OSCs possess an increased short circuit current, and correspondingly an elevated power conversion efficiency with the enhancement factor of ~11%. The origin of performance improvement in OSCs with the Au@SiO 2 NRs was analyzed systematically using morphological, electrical, optical characterizations along with theoretical simulation. It is found that the broadband enhancement in absorption, which yields the broadband enhancement in exciton generation in the active layer, is the major factor contributing to the increase in the short circuit current density. Simulation results suggest that the excitation of the transverse and longitudinal surface plasmon resonances of individual NRs as well as their mutual coupling can generate strong electric field near the vicinity of the NRs, thereby an improved exciton generation profile in the active layer. The incorporation of Au@SiO 2 NRs at the buffer/active interface also improves hole extraction in the OSCs, resulting in an increase in the open circuit voltage along with a decrease in the series resistance.

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Improved performance of organic solar cells by incorporating silica-coated silver nanoparticles in the buffer layer

Abstract: An enhancement of 19.2% in PCE is obtained by incorporating silica-coated silver nanoparticles into the buffer layer of organic solar cells.

Cited by 52 publications

References 35 publications

Fluoro‐Substituted n‐Type Conjugated Polymers for Additive‐Free All‐Polymer Bulk Heterojunction Solar Cells with High Power Conversion Efficiency of 6.71%

Fluoro‐Substituted n‐Type Conjugated Polymers for Additive‐Free All‐Polymer Bulk Heterojunction Solar Cells with High Power Conversion Efficiency of 6.71%

Broadband Enhancement of PbS Quantum Dot Solar Cells by the Synergistic Effect of Plasmonic Gold Nanobipyramids and Nanospheres

Efficiency enhancement in organic solar cells by incorporating silica-coated gold nanorods at the buffer/active interface

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