Engineering 3D perovskites for photon interconversion applications

Nienhaus, Lea

doi:10.1371/journal.pone.0230299

Cited by 13 publications

(18 citation statements)

References 91 publications

(135 reference statements)

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“…[11] There are several distinct routes possible for creating higher energy photons, including non-linear frequency generation, UC based on the ladder-like energy levels in lanthanide ions [12][13][14] and triplet-triplet annihilation (TTA) in organic semiconductors. [15][16][17][18][19][20][21][22][23] In TTA, two spin-triplet states electroni-cally interact and 'annihilate' to generate a high-energy singlet state in a spin-allowed process. Due to the low absorption cross sections of triplet states, these states are 'dark' and only weakly accessible by optical means.…”

Section: Introductionmentioning

confidence: 99%

One‐Step Fabrication of Perovskite‐Based Upconversion Devices

et al. 2020

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Device fabrication methods for applications in upconversion processes using perovskite thin films have suffered from reproducibility and scalability issues, which prevent the upscaling of this technology. In this contribution, we developed a perovskite‐based upconversion device approach where the triplet annihilator is added in situ to the antisolvent and investigated the effect of the device fabrication procedure on the properties of our device. By comparing the properties of a device based on our new fabrication approach with the existing bilayer procedure, we seek to shed light on the underlying optoelectronic processes influenced by the different fabrication methods, while further advancing possible device architectures for upconversion devices. Device characterization by optical methods, X‐ray diffraction and atomic force microscopy revealed that the in situ fabricated devices match the performance or even outcompete our previously developed bilayer devices while significantly simplifying the device fabrication. In particular, we find that the developed one‐step fabrication technique enables intercalation of the upconverting layer into the perovskite film prior to annealing, resulting in a larger interface thus, more efficient charge extraction.

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Section: Introductionmentioning

confidence: 99%

One‐Step Fabrication of Perovskite‐Based Upconversion Devices

et al. 2020

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“…In the last decade, perovskite PV technologies have exploded in relevance, thanks in large part to the increase in efficiency from 3.8% to 25.5% 24,25 . Additionally, these materials have been studied in other applications including but not limited to light‐emitting diodes (LEDs), 26 lasers, 27–29 photodetectors, 30,31 triplet–triplet annihilation‐based upconversion (TTA‐UC), 32–35 catalysis, 36,37 and memory 38,39 …”

Section: Introductionmentioning

confidence: 99%

Recent advancements in halide perovskite nanomaterials and their optoelectronic applications

VanOrman

Nienhaus

2021

InfoMat

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Lead halide perovskite nanomaterials are among the forefront of developing materials for energy harvesting and light‐emitting applications. Their unique defect tolerance, high photoluminescent quantum yields, and vast synthetic tunability make them attractive for many optoelectronic applications. In this review article, the broad synthetic toolbox of these materials is discussed, including how synthetic conditions can tune the optical properties and dimensionality of the resulting perovskite nanomaterial. Additionally, we discuss the brief history, current state, and bright future of these materials, in tune with their optoelectronic applications, namely in light‐emitting diodes, lasing, photovoltaics, photon interconversion applications, and in photodetectors.

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“…[ 1,6,7 ] This phenomenon was first discovered in single molecules of anthracene and phenanthrene as early as 1962, [ 8 ] continued research has produced increasingly efficient TTA‐UC systems and revealed the ease of tuning optical properties in multicomponent systems. [ 9–11 ] The first step in two‐component triplet upconversion is photon absorption by a sensitizer (donor) molecule, resulting in the generation of a singlet excited state, S 1 ( Figure a). It converts to the triplet excited state ( T 1 ) through intersystem crossing (ISC) and the excitation energy is then donated to an acceptor molecule through triplet energy transfer (TET).…”

Section: Introductionmentioning

confidence: 99%

Efficiency of Thermally Activated Delayed Fluorescence Sensitized Triplet Upconversion Doubled in Three‐Component System

et al. 2021

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As in many fields, the most exciting endeavors in photon upconversion research focus on increasing the efficiency (upconversion quantum yield) and performance (anti‐Stokes shift) while diminishing the cost of production. In this vein, studies employing metal‐free thermally activated delayed fluorescence (TADF) sensitizers have garnered increased interest. Here, for the first time, the strategy of ternary photon upconversion is utilized with the TADF sensitizer 2,4,5,6‐tetrakis(carbazol‐9‐yl)isophthalonitrile (4CzIPN), resulting in a doubling of the upconversion quantum yield in comparison to the binary system employing p‐terphenyl as the emitter. In this ternary blend, the sensitizer 4CzIPN is paired with an intermediate acceptor, 1‐methylnaphthalene, in addition to the emitter molecule, p‐terphenyl, yielding a normalized upconversion quantum yield of 7.6% while maintaining the 0.83 eV anti‐Stokes shift. These results illustrate the potential benefits of utilizing this strategy of energy‐funneling, previously used only with heavy‐metal based sensitizers, to increase the performance of these photon upconversion systems.

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Engineering 3D perovskites for photon interconversion applications

Cited by 13 publications

References 91 publications

One‐Step Fabrication of Perovskite‐Based Upconversion Devices

One‐Step Fabrication of Perovskite‐Based Upconversion Devices

Recent advancements in halide perovskite nanomaterials and their optoelectronic applications

Efficiency of Thermally Activated Delayed Fluorescence Sensitized Triplet Upconversion Doubled in Three‐Component System

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