Effect of blend layer morphology on performance of ZnPc:C60-based photovoltaic cells

Zeng, Wenjin; Yong, Kian Soon; Kam, Zhi Ming; Zhu, Furong; Li, Yuning

doi:10.1063/1.3493177

Cited by 53 publications

(35 citation statements)

References 22 publications

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“…As shown in Fig. 24 But for device 10, the performance of the device decreased a little compared to device 5, which may be caused by interface issues between the BHJ layer and the cathode. From Fig.…”

Section: Gradient Three-dimensional Ptb7-th:pc 71 Bm With Adjustable mentioning

confidence: 93%

A simple method to adjust the morphology of gradient three-dimensional PTB7-Th:PC₇₁BM polymer solar cells

Zhao

et al. 2015

Nanoscale

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Multiple interfaces are necessary for exciton separation in bulk heterojunction (BHJ) solar cells and continuous pathways for carrier transportation in donor : acceptor blend films, especially along the vertical direction, for efficient charge collection. Therefore film morphology is critically important to satisfy both in the construction of high performance organic solar cells (OSCs). In this work, the cooperative effect of solvent additives and solvent flux treatment on film morphology was confirmed. Furthermore, the correlation between a single processing parameter and the resulting morphology has been investigated. Our results show that film morphology can be tuned by changing the volume fraction of the solvent additive. Beyond that, after methanol fluxing, the OSC performance improves significantly, as short circuit current density (JSC) increases from 13.85 mA cm(-2) to 15.17 mA cm(-2) and fill factor (FF) from 62.9% to 65.7%, simultaneously. As a result, power conversion efficiency (PCE) increases from 6.79% to 7.67%. The favorable morphology was further investigated using time-of-flight secondary-ion mass spectroscopy (TOF-SIMS), and atomic force microscopy (AFM).

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Section: Gradient Three-dimensional Ptb7-th:pc 71 Bm With Adjustable mentioning

confidence: 93%

A simple method to adjust the morphology of gradient three-dimensional PTB7-Th:PC₇₁BM polymer solar cells

Zhao

et al. 2015

Nanoscale

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“…High purity is critical not only for devices performances, but also for long device life time. In addition, vacuum deposition allows facile fabrication of multilayered devices and facile control of the layers thickness [29]. Moreover the templating effect of the substrate, if present, on the organic film structure is amplified by the vacuum deposition process, since in that case the organic material is deposited molecule by molecule onto the substrate.…”

Section: Introductionmentioning

confidence: 99%

Effect of CuI Anode Buffer Layer on the Growth of Polymers Thin Films and on the Performances of Organic Solar Cells

Zamora¹,

Díaz²,

Valle³

et al. 2013

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Organic photovoltaic cells using polymer belonging to the aniline-heteroaryl family as electron donor have been achieved by thermal evaporation. We show that the properties of the polymer film, morphology, molecule order and conductivity depend strongly on the bottom anode buffer layer. While cells without anode buffer layer or with MoO 3 or CuI anode buffer layer have been probed, we show that CuI allows improving strongly the cells efficiency through an improvement of the morphology and conductivity of the polymer film. This shows that although it is necessary a good band matching at the interface, this is not sufficient, because the templating effect of CuI on the polymer film is primordial for photovoltaic cells improvement.

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“…There are usually two possible techniques to overcome the limitation: preparing bulk heterojunction by co-evaporating two materials to form a blend film; optimizing the thickness, molecular order and the morphology of organic materials. 4,5 In order to modify the structures of bulk heterojunction, controlling the growth condition [6][7][8] or introduction of buffer layers 9,10 has been investigated. High PCEs of 5-6% for single OPV cell have been reported.…”

Section: Introductionmentioning

confidence: 99%

Structural modifications of zinc phthalocyanine thin films for organic photovoltaic applications

Zhou

Taima

Miyadera

et al. 2012

Journal of Applied Physics

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Zinc phthalocyanine (ZnPc) thin films are vacuum-evaporated on bare indium-tin-oxide (ITO) coated glass by varying substrate temperature and growth rate. The samples are characterized by atomic force microscopy, X-ray diffraction and infrared spectroscopy. The temperature does not play a clear role in the crystalline growth of ZnPc possibly due to the significant structural defects on ITO surface, while it strongly influences the surface morphology and molecular alignment. The relationships between growth characteristics and performances of photovoltaics with planar heterojunction are discussed in detail. Increasing temperature or growth rate leads to a rougher surface morphology, which enables more donor/accepter interface area for photocurrent generation. Moreover, at elevated temperature, more molecules adopt standing-up geometry, resulting in a reduction in overall efficiency. The results imply that low-temperature a) Electronic mail: zhou@se.kanazawa-u.ac.jp, b) Electronic mail: taima@se.kanazawa-u.ac.jp 2 process in order to control the molecular alignment is preferred for efficient organic photovoltaics. By simply increasing the growth rate of ZnPc up to 40 Å/s at room temperature,ZnPc/C60 planar heterojunction shows an efficiency of 1.66%, compared to 1.24% for the cell when ZnPc is prepared at 0.10 Å/s.

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Effect of blend layer morphology on performance of ZnPc:C60-based photovoltaic cells

Cited by 53 publications

References 22 publications

A simple method to adjust the morphology of gradient three-dimensional PTB7-Th:PC₇₁BM polymer solar cells

A simple method to adjust the morphology of gradient three-dimensional PTB7-Th:PC₇₁BM polymer solar cells

Effect of CuI Anode Buffer Layer on the Growth of Polymers Thin Films and on the Performances of Organic Solar Cells

Structural modifications of zinc phthalocyanine thin films for organic photovoltaic applications

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Effect of blend layer morphology on performance of ZnPc:C60-based photovoltaic cells

Cited by 53 publications

References 22 publications

A simple method to adjust the morphology of gradient three-dimensional PTB7-Th:PC71BM polymer solar cells

A simple method to adjust the morphology of gradient three-dimensional PTB7-Th:PC71BM polymer solar cells

Effect of CuI Anode Buffer Layer on the Growth of Polymers Thin Films and on the Performances of Organic Solar Cells

Structural modifications of zinc phthalocyanine thin films for organic photovoltaic applications

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A simple method to adjust the morphology of gradient three-dimensional PTB7-Th:PC₇₁BM polymer solar cells

A simple method to adjust the morphology of gradient three-dimensional PTB7-Th:PC₇₁BM polymer solar cells