Continuous wave ultraviolet-laser sintering of ZnO and TiO2 nanoparticle thin films at low laser powers

Sandmann, Alice; Notthoff, Christian; Winterer, Markus

doi:10.1063/1.4788906

Cited by 14 publications

(5 citation statements)

References 22 publications

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“…The important advantage of photonic sintering is that it eliminates the need for heating at high temperature, which not only reduces the fabrication time, but also allows the use of inexpensive plastic substrates applicable in exible electronics. [62][63][64][65] In order to show that our photonic-sintered ZnO NSs led to the improved charge transfer characteristics of the dye cell, we conducted electrochemical impedance spectroscopy (EIS) measurements. The equivalent circuit used for the EIS measurements and the extracted EIS electronic parameters are presented in the ESI in Fig.…”

Section: Resultsmentioning

confidence: 99%

Photonic sintering of a ZnO nanosheet photoanode using flash white light combined with deep UV irradiation for dye-sensitized solar cells

Patil

Hwang

et al. 2017

RSC Adv.

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Section: Resultsmentioning

confidence: 99%

Photonic sintering of a ZnO nanosheet photoanode using flash white light combined with deep UV irradiation for dye-sensitized solar cells

Patil

Hwang

et al. 2017

RSC Adv.

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“…A focused continuous wave He-Cd laser with an excitation wavelength of 325 nm (Soliton, IK 3802 R-G) with a spot size of 5-8 μm was used for the UV-laser curing of the printed films in air. A detailed description of the laser can be found elsewhere [29]. We have used different laser powers and scan speeds (400-1700 μm s −1 ).…”

Section: Uv-laser Curingmentioning

confidence: 99%

High performance printed oxide field-effect transistors processed using photonic curing

et al. 2018

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Oxide semiconductors are highly promising candidates for the most awaited, next-generation electronics, namely, printed electronics. As a fabrication route for the solution-processed/printed oxide semiconductors, photonic curing is becoming increasingly popular, as compared to the conventional thermal curing method; the former offers numerous advantages over the latter, such as low process temperatures and short exposure time and thereby, high throughput compatibility. Here, using dissimilar photonic curing concepts (UV-visible light and UV-laser), we demonstrate facile fabrication of high performance InO field-effect transistors (FETs). Beside the processing related issues (temperature, time etc.), the other known limitation of oxide electronics is the lack of high performance p-type semiconductors, which can be bypassed using unipolar logics from high mobility n-type semiconductors alone. Interestingly, here we have found that our chosen distinct photonic curing methods can offer a large variation in threshold voltage, when they are fabricated from the same precursor ink. Consequently, both depletion and enhancement-mode devices have been achieved which can be used as the pull-up and pull-down transistors in unipolar inverters. The present device fabrication recipe demonstrates fast processing of low operation voltage, high performance FETs with large threshold voltage tunability.

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“…Unfortunately, intensive UV radiation may induce significant damage of the organic components because UV laser carries higher energy than typical bond dissociation energies of organic materials (2–3.6 eV). , Indeed, methylammonium iodide (MAI), one of the popular precursors for perovskite solar cells, is known to degrade under UV radiation . Besides, a UV laser may interact with transparent conductive oxides (TCO) such as indium tin oxides (ITO) and fluorine-doped tin oxide (FTO) and result in the modification of bonding characteristics and excessive heat generation. − …”

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confidence: 99%

Laser Crystallization of Organic–Inorganic Hybrid Perovskite Solar Cells

et al. 2016

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Organic−inorganic hybrid perovskites attract enormous research interest for next generation solar energy harvest. Synergistic crystalline structures comprising organic and inorganic components enable solution processing of perovskite films. A reliable crystallization method for perovskites, compatible with fast continuous process over large-area flexible substrates, is crucial for high performance solar cell production. Here, we present laser crystallization of hybrid perovskite solar cells using near-infrared (NIR) laser (λ = 1064 nm). Crystalline morphology of CH 3 NH 3 PbI 3 (MAPbI 3 ) perovskite films are widely controllable with laser irradiation condition while maintaining film uniformity. Photothermal heating effectively assisted by interfacial photoconversion layers is critical for phase transformation without beam damage of multilayered device structures. Notably, laser crystallization attains higher device performances than conventional thermal annealing. Fast laser crystallization with manufacture level scan rate (1 m min −1 ) demonstrates inverted-type perovskite solar cells with 11.3 and 8.0% efficiencies on typical glass and flexible polymer substrates, respectively, without rigorous device optimization.

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Continuous wave ultraviolet-laser sintering of ZnO and TiO2 nanoparticle thin films at low laser powers

Cited by 14 publications

References 22 publications

Photonic sintering of a ZnO nanosheet photoanode using flash white light combined with deep UV irradiation for dye-sensitized solar cells

Photonic sintering of a ZnO nanosheet photoanode using flash white light combined with deep UV irradiation for dye-sensitized solar cells

High performance printed oxide field-effect transistors processed using photonic curing

Laser Crystallization of Organic–Inorganic Hybrid Perovskite Solar Cells

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