Stability assessments on luminescent down-shifting molecules for UV-protection of perovskite solar cells

Gheno, Alexandre; Trigaud, Thierry; Bouclé, Johann; Audebert, Pierre; Ratier, Bernard; Vedraine, Sylvain

doi:10.1016/j.optmat.2017.11.027

Cited by 29 publications

(23 citation statements)

References 14 publications

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“…8,9,16,49 The remaining solar cell dimensions and materials are based on previous results from optimizations centered on maximizing the optical performance of front LT structures on the PSCs, 49 which are summarized in Table S1 of Supplementary Material. A preferential implementation of luminescent down-shifting (LDS) materials is via their embedment in a polymeric matrix used as the cell's encapsulant, 24,25,50 as sketched in Figure 1 a) and b), which is generally several micrometers thick. 24,50 Therefore, such DS encapsulant layer was modelled as the background medium over the cells' structures.…”

Section: Resultsmentioning

confidence: 99%

Optimum Luminescent Down-Shifting Properties for High Efficiency and Stable Perovskite Solar Cells

Alexandre

Chapa

Haque

et al. 2019

ACS Appl. Energy Mater.

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In recent years, the discovery of the excellent optical and electrical properties of perovskite solar cells (PSCs) made them a main focus of research in photovoltaics, with efficiency records increasing astonishingly fast since their inception. However, problems associated with the stability of these devices are hindering their market application. UV degradation is one of the most severe issues, chiefly caused by TiO2's photo-generated electrons that decompose the perovskite absorber material, coupled with the additional intrinsic degradation of this material under UV exposure. The solution presented here can minimize this effect while boosting the cells' generated photocurrent, by making use of combined light-trapping and luminescent downshifting effects capable of changing the harmful UV radiation to higher wavelengths that do not affect the stability and can be effectively "trapped" in the cell. This work focuses in the optimization of the photocurrent gains that can be attained by emulating the changed spectrum resulting from applying down-shifting media as encapsulant in photonic-enhanced PSCs, as well as the reduction in the harmful effects of UV radiation on the devices. Such optimized photonic solution allows current enhancement while reducing the harmful UV photo-carrier generation both in the TiO2 (by one order of magnitude) and in the perovskite (by 80%) relative to a standard PSC without light management.

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Section: Resultsmentioning

confidence: 99%

Optimum Luminescent Down-Shifting Properties for High Efficiency and Stable Perovskite Solar Cells

Alexandre

Chapa

Haque

et al. 2019

ACS Appl. Energy Mater.

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“…The emitted photons illuminate the solar cell either directly (4) or after reflection from the LDS layer/air interface (5). A part of the emitted photons is re-absorbed by other GQDs present in the LDS layer (6) and a fraction of them escapes from the front surface of the LDS layer/air interface (7) or edge planes (8).…”

Section: Optical Modelingmentioning

confidence: 99%

“…Degradation of organicinorganic perovskites has been observed mainly in the presence of moisture, at elevated temperatures and under UV irradiation. [6][7][8][9][10][11][12][13] Several approaches have been proposed to overcome the instabilities of PSC 9 and signicant progress has been made in this regard. Nevertheless, PSCs still severely suffer from inadequate photo-stability under continuous solar radiation especially UV radiation.…”

Section: Introductionmentioning

confidence: 99%

“…[16][17][18][19][20] Conversion of UV light to visible photons by luminescent down shiing materials has also been used to overcome the degradation of perovskite material under irradiation of UV light. 7,8,21,22 A careful study of the corresponding reports shows that although a better stability has been achieved in all efforts, the amount of light harvesting efficiency is not considerable in UV region. Therefore, not a remarkable enhancement in PCE is attained.…”

Section: Introductionmentioning

confidence: 99%

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Designing an efficient graphene quantum dot-filled luminescent down shifting layer to improve the stability and efficiency of perovskite solar cells by simple optical modeling

Hosseini

Ghanbari

2018

RSC Adv.

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“…[28][29][30][31][32] Unders unlight, charge-generation is induced, and both positive and negative chargec arriers are transported through the perovskite nanostructure to ETL/HTM charge selective contacts. [33][34][35][36][37] The core component of this solar cell is the perovskite active material, bearing ag eneric structure ABX 3 ,i nw hich Ai samonovalent cation (like methylammoniumC H 3 NH 3 + or MA, formamidinium CH 2 (NH 2 ) 2 + or FA,C s + ,R b + ), Bs tands for Pb II or Sn II and Xf or Io rB r. [38][39][40][41][42] The outstanding optoelectronic properties of perovskites, characterizedb yh igh mobility and absorption co-efficient, long-balanced carrier diffusionl ength and low-exciton bindinge nergy,j ustify the current success of this photovoltaic technology. [43][44][45][46][47] Severalr eview articles have been published on different strategies to improve the performance of lab-scale PSCs.…”

Section: Introductionmentioning

confidence: 99%

Caesium for Perovskite Solar Cells: An Overview

Bella

Renzi

Cavallo

et al. 2018

Chemistry A European J

150

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Perovskite solar cells have the potential to revolutionize the world of photovoltaics, and their efficiency close to 23 % on a lab-scale recently certified this novel technology as the one with the most rapidly raising performance per year in the whole story of solar cells. With the aim of improving stability, reproducibility and spectral properties of the devices, in the last three years the scientific community strongly focused on Cs-doping for hybrid (typically, organolead) perovskites. In parallel, to further contrast hygroscopicity and reach thermal stability, research has also been carried out to achieve the development of all-inorganic perovskites based on caesium, the performances of which are rapidly increasing. The potential of caesium is further strengthened when it is used as a modifying agent of charge-carrier layers in solar cells, but also for the preparation of perovskites with peculiar optoelectronic properties for unconventional applications (e.g., in LEDs, photodetectors, sensors, etc.). This Review offers a 360-degree overview on how caesium can strongly tune the properties and performance of perovskites and relative perovskite-based devices.

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Stability assessments on luminescent down-shifting molecules for UV-protection of perovskite solar cells

Cited by 29 publications

References 14 publications

Optimum Luminescent Down-Shifting Properties for High Efficiency and Stable Perovskite Solar Cells

Optimum Luminescent Down-Shifting Properties for High Efficiency and Stable Perovskite Solar Cells

Designing an efficient graphene quantum dot-filled luminescent down shifting layer to improve the stability and efficiency of perovskite solar cells by simple optical modeling

Caesium for Perovskite Solar Cells: An Overview

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