Light transfer characteristic in microspheric resonators

Zhang, Jing; Zhang, Yundong; Wang, Jinfang; Zhang, Xuenan; Yuan, Ping

doi:10.1016/j.photonics.2012.01.001

Cited by 18 publications

(25 citation statements)

References 32 publications

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“…Subsequent report by Xu et al also indicated the passivation effect by preparing perovskite–PCBM solid phase in PSCs . Chiang and Wu prepared PbI 2 –PCBM hybrid films and consequently CH 3 NH 3 PbI 3 –PCBM bulk heterojunction (BHJ) in inverted perovskite solar cells via a two‐step spin‐coating method, leading to improved mobility and diffusion length of charge carriers, yielding a PCE up to 16.0% with high fill factor of 0.82 . Wu et al reported an inverted‐structured PSCs with a perovskite‐fullerene graded heterojunction (GHJ) on top of perovskite layer, the presence of GHJ improved charge collection efficiency and reduced nonradiative recombination .…”

Section: Suppressing Nonradiative Recombinationmentioning

confidence: 99%

A Review on Additives for Halide Perovskite Solar Cells

Liu

Guan

Sheng

et al. 2019

Advanced Energy Materials

300

240

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Additives are widely adopted for efficient, stable, and hysteresis‐free perovskite solar cells and play an important role in various breakthroughs of perovskite solar cells (PSCs). Herein the various additives adopted for PSCs are reviewed and their functioning mechanism and influence on device performance is described. The main roles of additives, modulating morphology of perovskite films, stabilizing phase of formamidinium (FA) and cesium (Cs)‐based perovskites, adjusting energy level alignment in PSCs, suppressing nonradiative recombination in perovskites, eliminating hysteresis, enhancing operational stability of PSCs, are summarized.

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Section: Suppressing Nonradiative Recombinationmentioning

confidence: 99%

A Review on Additives for Halide Perovskite Solar Cells

Liu

Guan

Sheng

et al. 2019

Advanced Energy Materials

300

240

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show abstract

“…At last, a double layer ETL is IJP. The first layer is the fullerene derivative PCBM, which is a common solution‐processed ETL in PSCs [ 47,58,92–96 ] , and the second layer is BCP. We use PCBM instead of the more common C 60 as ETL, as PSCs with IJP C 60 thin‐films demonstrated poor performance (see more detailed discussion in the Supporting Information and Figure S12, Supporting Information).…”

Section: Inkjet Printing Of Perovskite Solar Cellsmentioning

confidence: 99%

Perovskite Solar Cells with All‐Inkjet‐Printed Absorber and Charge Transport Layers

Schackmar

Eggers

Frericks

et al. 2020

Adv Materials Technologies

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One of the key challenges of perovskite photovoltaics is the scalable fabrication of high‐efficiency perovskite solar cells (PSCs). Not only the scalable deposition of high‐quality perovskite thin‐films itself, but also the adjacent charge extraction layers is pivotal. In this work, PSCs based on all‐inkjet‐printed absorber and extraction layers are presented, allowing for a scalable and material‐efficient deposition. The inkjet‐printed PSCs are of p–i–n‐architecture with a precursor‐based nickel oxide hole‐transport layer, a high‐quality inkjet‐printed triple‐cation (methylammonium, formamidinium, and cesium) perovskite absorber layer and a double layer electron‐transport layer of phenyl‐C61‐butyric acid methyl ester and bathocuproine. The ink properties, inkjet parameters, and annealing procedure are optimized for each layer. PSCs with such inkjet‐printed absorber and charge carrier extraction layers demonstrate an efficiency of >17% with low hysteresis. Although printed in ambient atmosphere, the devices show excellent short‐term stability (40 h) even under elevated temperature (85 °C). These results are a promising next step on the way to fully inkjet‐printed perovskite solar cells, including both electrodes as well.

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“…Fullerene derivatives have played a hugely important role in the development of organic electronic devices, particularly organic solar cells. They remain the most widely used electron acceptors in organic/hybrid photovoltaic devices (OPVs), [ 1–4 ] while also demonstrating excellent photo responsivity as broadband photodetectors. [ 5–10 ] Parent fullerene structures have extremely challenging solubility, which limits their processability and miscibility with host materials in bulk heterojunction OPVs; an issue which has been addressed through the production of more soluble derivatives using simple cycloaddition chemistry.…”

Section: Figurementioning

confidence: 99%

Fullerene Desymmetrization as a Means to Achieve Single‐Enantiomer Electron Acceptors with Maximized Chiroptical Responsiveness

et al. 2020

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Parent fullerene structures have extremely challenging solubility, which limits their processability and miscibility with host materials in bulk heterojunction OPVs; an issue which has been addressed through the production of more soluble derivatives using simple cycloaddition chemistry. Bis[60]PCBM (PCBM = phenyl-C61-butyric acid methyl ester) (dimethyl 4,4′-[61,62-diphenly,3′H,3″Hdicyclopropa(C 60 I h)[5,6]fulleren-1,9:X,Ydiyl]dibutanoate) is one such derivative and one of the most utilized solubilized fullerenes, which is easy to synthesize, highly processable, and solar cells based on this material have high power conversion efficiencies. [11-18] The addition of two solubilizing addends to C 60 results in a large number of structural isomers however, each with varying energetic properties (influencing device voltage) and morphological properties (influencing device current). Despite this, bis[60]PCBM is synthesized and used as an isomeric mixture, and the role of individual isomers on morphological, spectroscopic, and device performance is very poorly understood. In a previous study, Dennis and coworkers separated the 19 structural isomers of bis[60]PCBM and characterized them using a combination of NMR, UV-vis, and retention times by HPLC. [19,20] Although the performance Solubilized fullerene derivatives have revolutionized the development of organic photovoltaic devices, acting as excellent electron acceptors. The addition of solubilizing addends to the fullerene cage results in a large number of isomers, which are generally employed as isomeric mixtures. Moreover, a significant number of these isomers are chiral, which further adds to the isomeric complexity. The opportunities presented by single-isomer, and particularly single-enantiomer, fullerenes in organic electronic materials and devices are poorly understood however. Here, ten pairs of enantiomers are separated from the 19 structural isomers of bis[60]phenyl-C61-butyric acid methyl ester, using them to elucidate important chiroptical relationships and demonstrating their application to a circularly polarized light (CPL)-detecting device. Larger chiroptical responses are found, occurring through the inherent chirality of the fullerene. When used in a single-enantiomer organic field-effect transistor, the potential to discriminate CPL with a fast light response time and with a very high photocurrent dissymmetry factor (g ph = 1.27 ± 0.06) is demonstrated. This study thus provides key strategies to design fullerenes with large chiroptical responses for use as chiral components of organic electronic devices. It is anticipated that this data will position chiral fullerenes as an exciting material class for the growing field of chiral electronic technologies.

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Light transfer characteristic in microspheric resonators

Cited by 18 publications

References 32 publications

A Review on Additives for Halide Perovskite Solar Cells

A Review on Additives for Halide Perovskite Solar Cells

Perovskite Solar Cells with All‐Inkjet‐Printed Absorber and Charge Transport Layers

Fullerene Desymmetrization as a Means to Achieve Single‐Enantiomer Electron Acceptors with Maximized Chiroptical Responsiveness

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