P3HT:PCBM Doped with Multi-Walled Carbon Nanotubes for Enhancing Efficiency and Nanomechanical Properties of Hybrid Photovoltaics

Wang, Shihao; Hsiao, Yu‐Jen; Fang, Te-Hua; Chen, Sung-Long; Kang, Shao-Hui

doi:10.1166/sam.2015.2018

Cited by 2 publications

(1 citation statement)

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“…Since the pioneering work of Tang [4] on PV devices based on the electron-donor (D)/electron-acceptor (A), there have been significant achievements, particularly in the investigation of bulk heterojunction (BHJ) devices using conjugated carbonaceous polymers and C 60 fullerene as a photoactive acceptor material [5][6][7][8][9][10][11]. In these BHJ devices, the generated photocharges may be dissociated into free carriers at the interfaces between the donor and acceptor nanodomains.…”

Section: Introductionmentioning

confidence: 99%

Graphene nanoplatelet doping of P3HT:PCBM photoactive layer of bulk heterojunction organic solar cells for enhancing performance

et al. 2018

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Hybrid organic photovoltaic (OPV) cells based on conjugated polymers photoactive materials are promising candidates for flexible, high-performance and low-cost energy sources owing to their inexpensive materials, cost-effective processing, and ease of fabrication by simple solution processes. However, the modest PV performance obtained to date -in particular the low power conversion efficiency (PCE)- has impeded the large scale deployment of OPV cells. The low PCE in OPV solar cells has been mainly attributed to low carrier mobility, which is closely correlated to the transport diffusion length of the charge carriers within the photoactive layers. The 2D graphene material can be an excellent candidate for assisting the charge transport improvement in the active layer of OPV cells due to its huge carrier mobility, thermal and chemical stability, and its compatibility with the solution process. In this work, we report on the improvement of optoelectronic properties and photovoltaic performance of graphene nanoplatelets (GNP) doped P3HT:PCBM photoactive blended layers, integrated into a bulk heterojunction (BHJ) organic photovoltaic based device, using PEDOT:PSS on ITO/glass substrate. First, the light absorption capacity was observed to increase with respect to the GNP contents while the photoluminescence showed a clear quenching, indicating electrons transfer between the graphene sheets and the polymeric matrix. Then, the incorporation of GNP into the BHJ active layer has resulted in enhanced PV performance with respect to a reference cell, and the best PV performances were obtained with 3 wt. % of GNP loading, with an open-circuit voltage of 1.24 V, a short-circuit current density value of 6.18 mA/cm2, a fill factor of 47.12 %, and a power conversion efficiency of about 3.61 %. We believe that the obtained results contribute to the development of organic photovoltaic devices and to the understanding of the impact of sp2-bonded carbon therein.

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