Optimizing the organic solar cell efficiency: Role of the active layer thickness

Date

2013-06-01

Author

APAYDIN, Dogukan Hazar
Yildiz, Dilber Esra
Çırpan, Ali
Toppare, Levent Kamil

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A 2-dodecyl benzotriazole and 9,9-dioctylfluorene containing alternating conjugated polymer, poly((9,9-dioctylfluorene)-2,7-diyl-(4,7-bis(thien-2-yl) 2-dodecyl-benzo[1,2,3]triazole)) (PFTBT), was blended with PCBM (1:1, w/w) and spin coated on ITO substrates using varying rotational speeds to obtain different active layer thicknesses. J-V characteristics of the constructed devices were investigated both in dark and under simulated sunlight (AM 1.5G, 100 mW/cm(2)). For the determination of hole mobilities the space charge limited current (SCLC) method was used and found as 1.69 x 10(-6) cm(2)/Vs. In addition, the power conversion efficiency (PCE) of the devices was varied according to active layer thickness and the best power conversion efficiency was recorded as 1.06%. Moreover, incident-photon-to-current-efficiency (IPCE) measurements were carried out and the best efficiency was found to be 51%. Morphology of the active layers was probed using AFM and TEM techniques.

Subject Keywords

Active layer optimization, Organic solar cells, Space charge limited current

URI

https://hdl.handle.net/11511/45841

Journal

SOLAR ENERGY MATERIALS AND SOLAR CELLS

DOI

https://doi.org/10.1016/j.solmat.2013.02.003

Collections

Department of Chemistry, Article

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Citation Formats

D. H. APAYDIN, D. E. Yildiz, A. Çırpan, and L. K. Toppare, “Optimizing the organic solar cell efficiency: Role of the active layer thickness,” SOLAR ENERGY MATERIALS AND SOLAR CELLS, pp. 100–105, 2013, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/45841.