Fabrication of bulk heterojunction photovoltaic cells with controlled distribution of p-n components by evaporative spray deposition using ultradilute solution

Shakutsui, Masato; Iwamoto, Tadashi; Maeda, Ryoji; Tsutsui, Tetsuo; Fujita, Katsuhiko

doi:10.1117/12.794319

Cited by 5 publications

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“…This method shares the common features with the controlled vacuum deposition of the D/A molecules to form the interpenetrating network throughout the bulk film . Furthermore, the nanoscale morphology of spray-coated polymer films is independent of the vertical phase separation, making this a suitable technique to form the ideal vertical composition profile that facilitates charge collection, where the anode is P3HT-enriched and the cathode is PCBM-enriched. ,, Examples of controlled distribution and gradient junction polymer solar cells to realize an optimal vertical morphology by spray coating have been recently reported. , …”

Section: Resultsmentioning

confidence: 58%

“…25,26,34 Examples of controlled distribution and gradient junction polymer solar cells to realize an optimal vertical morphology by spray coating have been recently reported. 35,36 The inherent advantage of the alternating spray deposition is revealed in the JϪV characteristics shown in the inset of Figure 4a. As-cast films by the alternating deposition exhibit better device performance of 0.42% versus 0.27% PCE compared to its blend solution counterpart, with the detailed device characteristics listed in Table 1.…”

Section: Resultsmentioning

confidence: 99%

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Multi-Source/Component Spray Coating for Polymer Solar Cells

et al. 2010

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A multi-source/component spray coating process to fabricate the photoactive layers in polymer solar cells is demonstrated. Well-defined domains consisting of polymer:fullerene heterojunctions are constructed in ambient conditions using an alternating spray deposition method. This approach preserves the integrity of the layer morphology while forming an interpenetrating donor (D)/acceptor (A) network to facilitate charge transport. The formation of multi-component films without the prerequisite of a common solvent overcomes the limitations in conventional solution processes for polymer solar cells and enables us to process a wide spectrum of materials. Polymer solar cells based on poly(3-hexylthiophene):[6,6]-phenyl C(61) butyric acid methyl ester spray-coated using this alternating deposition method deliver a power conversion efficiency of 2.8%, which is comparable to their blend solution counterparts. More importantly, this approach offers the versatility to independently select the optimal solvents for the donor and acceptor materials that will deliver well-ordered nanodomains. This method also allows the direct stacking of multiple photoactive polymers with controllable absorption in a tandem structure even without an interconnecting junction layer. The introduction of multiple photoactive materials through multisource/component spray coating offers structural flexibility and tenability of the photoresponse for future polymer solar cell applications.

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Section: Resultsmentioning

confidence: 58%

Section: Resultsmentioning

confidence: 99%

Multi-Source/Component Spray Coating for Polymer Solar Cells

et al. 2010

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Fast Screening of the Optimal Polymer Ratio for Organic Solar Cells Using a Spray-Coating Deposition Method for the Fullerene Mixture

Lee¹,

Sagawa²

2013

Energy Technology

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Fast Screening of the Optimal Polymer Ratio for Organic Solar Cells Using a Spray-Coating Deposition Method for the Fullerene Mixture

Lee¹,

Sagawa²

2012

Energy Technology

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Bulk‐heterojunction organic solar cells generate electrical power from light absorption in the active layer and consist of a mixture of electron donor and acceptor materials. The donor/acceptor ratio is one of the critical parameters that determines the electrical characteristics of bulk‐heterojunction solar cells. Therefore, the optimal ratio of the donor/acceptor must be determined to achieve maximum efficiency in bulk‐heterojunction solar cells. In this work, modified spray‐ or mist‐coating methods are applied to control the donor/acceptor ratio systematically and continuously. The feasibility of this processing method for polymer‐ratio screening is investigated by monitoring the morphological and optical properties of polymer solar cells based on poly(3‐hexylthiophene) (P3HT)/[6,6]‐phenyl C61 butyric acid methyl ester (PCBM). Finally, the optimum ratio of P3HT/PCBM is obtained by increasing the ratio of P3HT/PCBM gradually. This study provides a strong and practical screening method to define the critical mixture ratio among the enormous number of polymer–fullerene combinations.

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Fabrication of bulk heterojunction photovoltaic cells with controlled distribution of p-n components by evaporative spray deposition using ultradilute solution

Cited by 5 publications

References 0 publications

Multi-Source/Component Spray Coating for Polymer Solar Cells

Multi-Source/Component Spray Coating for Polymer Solar Cells

Fast Screening of the Optimal Polymer Ratio for Organic Solar Cells Using a Spray-Coating Deposition Method for the Fullerene Mixture

Fast Screening of the Optimal Polymer Ratio for Organic Solar Cells Using a Spray-Coating Deposition Method for the Fullerene Mixture

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