Vapor Coating Method Using Small-Molecule Organic Surface Modifiers to Replace N-Type Metal Oxide Layers in Inverted Polymer Solar Cells

Choi, Hyosung; Kim, Hak Beom; Ko, Seo Jin; Kim, Gi Hwan; Kim, Jin Young

doi:10.1021/am500092a

Cited by 4 publications

(2 citation statements)

References 31 publications

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“…For example, in base treatment, bases bind with the acidic sites on the ITO surface and the remaining cations assembled on top of ITO substrate, thus forming an interface dipole and decreasing the ITO WF. Based on this principle, many basic organic materials with amino groups were reported for use as CIMs in OSCs . Deng and co‐workers reported environmentally friendly biomaterial glycylglycine (Gly–Gly, Scheme ) as a CIM in inverted OSCs .…”

Section: Small Molecule Cathode Interlayermentioning

confidence: 99%

Small Molecule Interlayers in Organic Solar Cells

Zhang

Usman

2018

Advanced Energy Materials

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This review provides an up‐to‐date review about the small molecule interlayers (SMIs) in organic solar cells (OSCs). Compared to polymer interlayers, SMIs exhibit intrinsic advantages such as easy synthesis and purification, monodispersity, well‐defined chemical structure, and high batch‐to‐batch reproducibility. Recently, various SMIs have been reported with landmark efficiencies of over 10% in both conventional and inverted OSCs, exhibiting promising potential in commercial application. In this review, the authors summarize the progress of SMIs from a device fabrication point of view, paying particular attention to the material categories, molecular design, preparation process, and applicable device structure. In addition, the working mechanisms of different SMIs are also discussed, including the structure–property relationships and the corresponding impact on device performance. Finally, a brief outlook is provided that includes opportunities and challenges in this emerging area.

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Section: Small Molecule Cathode Interlayermentioning

confidence: 99%

Small Molecule Interlayers in Organic Solar Cells

Zhang

Usman

2018

Advanced Energy Materials

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“…Also, the high sensitivity toward air and moisture of the Ca layer largely limits the device stability . So far, several types of cathode buffer layer materials have been developed, including inorganic metal oxides (e.g., ZnO and TiOx) − and water/alcohol soluble organic/polymeric materials − which have been used to fabricate the cathode buffer layer for high-performance single junction ,, or tandem , OSCs. Nevertheless, many of these materials require relatively complicated synthetic processes which inevitably lead to the cost increase, while the future commercial demand requires the use of low-cost but high-performance cathode interlayer materials.…”

Section: Introductionmentioning

confidence: 99%

Tetraphenylphosphonium Bromide as a Cathode Buffer Layer Material for Highly Efficient Polymer Solar Cells

Gupta

Yan

et al. 2018

ACS Appl. Mater. Interfaces

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Here, we introduced the role of small organic molecule tetraphenylphosphonium bromide (QPhPBr) as an electron-transporting layer (ETL) material for fabricating high-efficiency bulk heterojunction polymer solar cells (PSCs). Their significantly higher power conversion efficiency (PCE) in well-known active layer devices (PTB7-Th:PCBM, PBDTTT-CT:PCBM, and P3HT:PCBM) was observed compared to that of the bare Al cathode. The use of N719 as an ETL was also demonstrated. Observed data reveal that QPhPBr-based devices exhibit high PCEs up to 9.18, 8.42, and 4.81% from PTB7-Th, PBDTTT-CT, and P3HT, respectively. For comparisons, the bare Al devices show PCEs of 5.37, 4.75, and 3.01%, respectively. Moreover, further enhancement of PSC efficiency (9.83, 8.69, and 5.35%) is achieved from mixed binary solution of N719:QPhPBr because of modulated adjustment of the work function of the Al electrode. Our results indicate the excellent function of tetraphenylphosphonium bromide and its binary blend as effective small-molecule organic materials to regulate the metal surface properties and the potential used as excellent cathode buffer layer materials for realizing high-efficiency PSCs.

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An Organic Surface Modifier to Produce a High Work Function Transparent Electrode for High Performance Polymer Solar Cells

Choi

Kim

et al. 2014

Advanced Materials

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Modification of an ITO electrode with small-molecule organic surface modifier, 4-chloro-benzoic acid (CBA), via a simple spin-coating method produces a high-work-function electrode with high transparency and a hydrophobic surface. As an alternative to PEDOT:PSS, CBA modification achieves efficiency enhancement up to 8.5%, which is attributed to enhanced light absorption within the active layer and smooth hole transport from the active layer to the anode.

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Vapor Coating Method Using Small-Molecule Organic Surface Modifiers to Replace N-Type Metal Oxide Layers in Inverted Polymer Solar Cells

Cited by 4 publications

References 31 publications

Small Molecule Interlayers in Organic Solar Cells

Small Molecule Interlayers in Organic Solar Cells

Tetraphenylphosphonium Bromide as a Cathode Buffer Layer Material for Highly Efficient Polymer Solar Cells

An Organic Surface Modifier to Produce a High Work Function Transparent Electrode for High Performance Polymer Solar Cells

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