Controlling crystallization to imprint nanophotonic structures into halide perovskites using soft lithography

Brittman, Sarah; Oener, Sebastian Z.; Ke, Guo; Āboliņš, Haralds; Koenderink, A. Femius; Garnett, Erik C.

doi:10.1039/c7tc02775c

Cited by 58 publications

(68 citation statements)

References 35 publications

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“…During this process, a large number of small crystals generate slowly with volatilized solvent (at 50 °C). Then the perovskite grains migrate and recrystallize to form large crystals (at 100 °C) and achieve good crystalline within the spatial confinement . Besides, high‐resolution, cross‐sectional scanning electron microscopy (SEM) images and energy dispersive X‐ray (EDX) spectrum of the nanowire arrays prepared on indium tin oxide substrates further confirm that no perovskite is left between the nanowires (Figure S3, Supporting Information) …”

Section: Resultsmentioning

confidence: 81%

Semitransparent, Flexible, and Self‐Powered Photodetectors Based on Ferroelectricity‐Assisted Perovskite Nanowire Arrays

Cao

Tian

Wang

et al. 2019

Adv Funct Materials

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Transparent and flexible photodetectors hold great promise in next-generation portable and wearable optoelectronic devices. However, most of the previously reported devices need an external energy power source to drive its operation or require complex fabrication processes. Herein, designed is a semitransparent, flexible, and self-powered photodetector based on the integrated ferroelectric poly(vinylidene-fluoride-trifluoroethylene) (P(VDF-TrFE)) and perovskite nanowire arrays on the flexible polyethylene naphthalate substrate via a facile imprinting method. Through optimizing the treatment conditions, including polarization voltage, polarization time, and the concentration of P(VDF-TrFE), the resulting device exhibits remarkable detectivity (7.3 × 10 12 Jones), fast response time (88/154 µs) at zero bias, as well as outstanding mechanical stability. The excellent performance is attributed to the efficient charge separation and transport originating from the highly oriented 1D transport pathway and the polarization-induced internal electric field within P(VDF-TrFE)/perovskite hybrid nanowire arrays.

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Section: Resultsmentioning

confidence: 81%

Semitransparent, Flexible, and Self‐Powered Photodetectors Based on Ferroelectricity‐Assisted Perovskite Nanowire Arrays

Cao

Tian

Wang

et al. 2019

Adv Funct Materials

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“…As demonstrated by other groups, a front-side textured architecture can be realised with nanoimprint processes. [26][27][28] Paetzold and coworkers demonstrated that pattering the front surface does not affect Table 1. LiF 107 ITO 80 SnO 2 5 PCBM 15 perovskite 333 NiO 10 ITO 20 n + a-Si:H 8 i a-Si:H 5 Table 1 The thicknesses of the layers in our simulated tandem cell.…”

Section: Simulated Tandem Cell Architecturesmentioning

confidence: 99%

Nanophotonic light management for perovskite–silicon tandem solar cells

Chen

Manley

2018

J. Photon. Energy

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Perovskite-silicon tandem solar cells are currently one of the most investigated concepts to overcome the theoretical limit for the power conversion efficiency of silicon solar cells. For monolithic tandem solar cells the available light must be distributed equally between the two subcells, which is known as current matching. For a planar device design, a global optimization of the layer thicknesses in the perovskite top cell allows current matching to be reached and reflective losses of the solar cell to be minimized at the same time. However, even after this optimization reflection and parasitic absorption losses occur, which add up to 7 mA/cm 2 .In this contribution we use numerical simulations to study, how well hexagonal sinusoidal nanotextures in the perovskite top-cell can reduce the reflective losses of the combined tandem device. We investigate three configurations. The current density utilization can be increased from 91% for the optimized planar reference to 98% for the best nanotextured device (period 500 nm and peak-to-valley height 500 nm), where 100% refers to the Tiedje-Yablonovitch limit. In a first attempt to experimentally realize such nanophotonically structured perovskite solar cells for monolithic tandems, we investigate the morphology of perovskite layers, which are deposited onto sinusoidally structured substrates.

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“…The resulting patterned perovskite grating film (Figure b) was integrated in parallel‐type photodetector arrays, exhibiting respectable photocurrent switching properties in the visible regime (Figure c). Afterward, Garnett et al improved this method by using DMF&DMSO mixed solvents . The low‐ T b ( = 153 °C) solvent, DMF, evaporated rapidly from the perovskite thin film during preannealing, resulting in supersaturation of the perovskite precursor and triggering homogeneous nucleation.…”

Section: Direct Patterning Technologymentioning

confidence: 99%

Patterned Perovskites for Optoelectronic Applications

Yang

Liu

et al. 2018

Small Methods

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As a mature strategy for constructing microstructures, patterning technologies are widely used in the optoelectronic field to satisfy the requirements of functional and/or aesthetic purposes. With the emergence of organic–inorganic hybrid perovskites, applying patterning technologies to perovskites can further optimize the properties of perovskite‐based optoelectronic devices, thereby enhancing their competitiveness in commercialization. To date, a series of perovskite patterning methods and patterned devices have been reported consecutively, which exhibit potential value and application prospects in the fields of optoelectronics, light‐emitting devices, building of integrated photovoltaic systems, etc. Here, the recent progress in perovskite patterning technologies is systematically summarized, divided into two major categories: indirect patterning and direct patterning. In addition, the merits of the patterning methods and their applications in optoelectronics are discussed.

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Controlling crystallization to imprint nanophotonic structures into halide perovskites using soft lithography

Abstract: Nanophotonic patterns are imprinted into halide perovskite films using polymer stamps and a solvent mixture to control the perovskite's crystallization.

Cited by 58 publications

References 35 publications

Semitransparent, Flexible, and Self‐Powered Photodetectors Based on Ferroelectricity‐Assisted Perovskite Nanowire Arrays

Semitransparent, Flexible, and Self‐Powered Photodetectors Based on Ferroelectricity‐Assisted Perovskite Nanowire Arrays

Nanophotonic light management for perovskite–silicon tandem solar cells

Patterned Perovskites for Optoelectronic Applications

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