Fabrication of organic thin-film transistors by spray-deposition for low-cost, large-area electronics

Azarova, Natalia A.; Owen, Jack W.; McLellan, Claire A.; Grimminger, Marsha A.; Chapman, Eric; Anthony, John E.; Jurchescu, Oana D.

doi:10.1016/j.orgel.2010.09.008

Cited by 143 publications

(91 citation statements)

References 33 publications

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“…This difference may originate from the difference in nucleation between these two coating processes, similar to the difference observed in crystalline morphologies between spin-and drop-cast fi lms. [ 43,44 ] In other words, blade-coating offers longer time for self-assembling during the solvent drying process, and thus encourages the formation of larger and denser crystalline domains as schematically presented in Figure 3 c. The larger grain structure, acting like air-protection patches, can reduce the permeability of oxygen/moisture to enhance the resulting stability. Since similar enhancement in stability has also been observed for perovskites with larger grain structure, it is possible that the crystalline domain size plays an important role on the resulting stability of the blade-coated devices.…”

Section: Wileyonlinelibrarycommentioning

confidence: 99%

Enhanced Environmental Stability of Planar Heterojunction Perovskite Solar Cells Based on Blade‐Coating

Kim

Williams

Cho

et al. 2014

Advanced Energy Materials

342

257

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that the blade-coating process encourages the formation of self-assembled large perovskite crystalline domains featuring uniform fi lm coverage and signifi cantly improved device ambient stability. In addition, we reveal that this blade-coating process can also be applicable to systems based on using the advanced solvent engineering technique reported for high-performance perovskite (CH 3 NH 3 PbI 3 ) solar cells. [ 35,36 ] Blade-coating is a simple, cost-effi cient, and roll-to-roll compatible process for optoelectronic device fabrication. [ 37,38 ] In the case of perovskites, we fi nd that the formation of large crystalline domains is encouraged by the relatively slow solvent drying process in the uniformly wet fi lm formed immediately after solution blading. It may change the nucleation kinetics of perovskites to ensure self-assembly driven growth. Taking advantage of this process, we have applied blade-coating to the preparation of CH 3 NH 3 PbI 3-x Cl x perovskite fi lms to achieve high quality and moisture/air-resistant fi lms under ambient conditions.To examine the processability of perovskite fi lms in ambient and explore the effect of different coating methods on device performance, we have fabricated perovsktie solar cells using both spin-and blade-coating. The fi lms were annealed at 90 °C in air for 2 h after both coating processes; but in the case of bladecoating, the wet fi lms formed immediately after solution blading were kept at room temperature for 40 min before annealing to wait for the majority of N,N -dimethylformamide (DMF) solvent to be evaporated. The same coating and annealing conditions were used for other perovskite fi lms studied later in this work. The device confi guration and energy band diagram of materials used in this study is shown in Figure 1 . [ 39,40 ] The photoactive perovskite layer was prepared from a precursor solution with 1 wt% of 1,8-diiodooctane (DIO) additive following the reported method. [ 23 ] For comparison, we have also fabricated reference perovskite solar cells under inert environment, a N 2 -fi lled glove box. The best performing reference device shows a PCE of 10.30%, and the detailed photovoltaic properties of the reference perovskite cells are shown in Figure S1 in the Supporting Information. Current densityvoltage ( J -V ) characteristics of perovskite solar cells fabricated with two coating methods in ambient conditions are shown in Figure 2 a, with summarized device performance in Table 1 .Hybrid organic-inorganic halide perovskites have attracted signifi cant attention from both academia and industry due to their unique structural and optoelectronic properties such as high crystallinity, excellent charge carrier mobility, luminescence and energy harvesting characteristics [1][2][3][4][5][6][7][8][9][10][11][12] that led to very rapid progress in perovskite solar cells. [13][14][15][16] However, fabrication of high-performance perovskite solar cells, particularly those based on compact titanium dioxide (TiO 2 ) electron-transporting layers, involves hig...

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Section: Wileyonlinelibrarycommentioning

confidence: 99%

Enhanced Environmental Stability of Planar Heterojunction Perovskite Solar Cells Based on Blade‐Coating

Kim

Williams

Cho

et al. 2014

Advanced Energy Materials

342

257

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“…14 As alternatives to the more elaborate processes of vacuum evaporation and deposition of organic and inorganic molecular materials, solution processes, including spin-coating, spray-coating, dip-coating, roller-coating and ink-jet printing, are well known and can be used to deposit polymer materials on a variety of substrates, such as glasses, plastics, metal foils and wafers. [15][16][17][18][19][20][21] Single-layer structure. The simplest structure for a hybrid memory device fabricated utilizing the solution method is a single-polymer layer embedded with inorganic nanomaterials and sandwiched between two metal electrodes, as shown in Figure 3.…”

Section: Device Structure and Fabrication Of The Nonvolatile Memory Dmentioning

confidence: 99%

Electrical memory devices based on inorganic/organic nanocomposites

Kim

Yang²,

et al. 2012

NPG Asia Mater

168

110

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Nonvolatile memory devices based on hybrid inorganic/organic nanocomposites have emerged as excellent candidates for promising applications in next-generation electronic and optoelectronic devices. Among the various types of nonvolatile memory devices, organic bistable devices fabricated utilizing hybrid organic/inorganic nanocomposites have currently been receiving broad attention because of their excellent performance with high-mechanical flexibility, simple fabrication and low cost. The prospect of potential applications of nonvolatile memory devices fabricated utilizing hybrid nanocomposites has led to substantial research and development efforts to form various kinds of nanocomposites by using various methods. Generally, hybrid inorganic/organic nanocomposites are composed of organic layers containing metal nanoparticles, semiconductor quantum dots (QDs), core-shell semiconductor QDs, fullerenes, carbon nanotubes, graphene molecules or graphene oxides (GOs). This review article describes investigations of and developments in nonvolatile memory devices based on hybrid inorganic/organic nanocomposites over the past 5 years. The device structure, fabrication and electrical characteristics of nonvolatile memory devices are discussed, and the switching and carrier transport mechanisms in the hybrid nonvolatile memory devices are reviewed. Furthermore, various flexible memory devices fabricated utilizing hybrid nanocomposites are described and their future prospects are discussed.

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“…[1][2][3] Molecular modifi cations can yield soluble semiconductors that allow reduced complexity device fabrication using methods such as spin-coating, ink-jet printing, roll-to-roll processing and spray-deposition. [4][5][6][7] Trialkylsilylethyne-substitution of fused aromatics in particular is an effective method to induce stability, solubility and π -stacking interactions favourable for charge transport in semiconductor chromophores. [ 8 ] Using this technique, derivatives of pentacene [ 9 ] and its heteroatom analogue anthradithiophene (ADT) [ 10 ] have shown impressive performance in thin-fi lm transistor studies, and single crystal mobilities comparable with their insoluble counterparts.…”

Section: Doi: 101002/adma201101619mentioning

confidence: 99%

Effect of Acene Length on Electronic Properties in 5‐, 6‐, and 7‐Ringed Heteroacenes

Goetz

Ward

et al. 2011

Advanced Materials

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Fabrication of organic thin-film transistors by spray-deposition for low-cost, large-area electronics

Cited by 143 publications

References 33 publications

Enhanced Environmental Stability of Planar Heterojunction Perovskite Solar Cells Based on Blade‐Coating

Enhanced Environmental Stability of Planar Heterojunction Perovskite Solar Cells Based on Blade‐Coating

Electrical memory devices based on inorganic/organic nanocomposites

Effect of Acene Length on Electronic Properties in 5‐, 6‐, and 7‐Ringed Heteroacenes

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