Ultraviolet-Filtering Luminescent Transparent Coatings for High-Performance PTB7-Th:ITIC–Based Organic Solar Cells

Farinhas, Joana; Correia, Sandra F. H.; Fu, Lianshe; Botas, Alexandre M. P.; André, Paulo S.; Ferreira, Rute A. S.; Charas, Ana

doi:10.3389/fnano.2021.635929

Cited by 5 publications

(5 citation statements)

References 49 publications

(81 reference statements)

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“…UV-blocking layers fall into two main categories: organic and inorganic UV filters. Organic UV filters, which often feature aromatic rings, are composed of carbon-based substances. − Contrastingly, inorganic UV filters, composed of metal oxides, absorb or reflect UV radiation, thereby shielding the sensitive perovskite layer from penetration. Moreover, these metal oxides provide long-lasting UV protection, a benefit stemming from their compatibility with the photon energy range of 3.0–3.4 eV. , In our preliminary study, we applied CeO 2 as a passivation layer to absorb UV light, resulting in an increase in PCE to 22.71%, surpassing the 20.7% achieved with SnO 2 PSCs.…”

Section: Introductionmentioning

confidence: 99%

“…Organic UV filters, which often feature aromatic rings, are composed of carbon-based substances. 30 − 32 Contrastingly, inorganic UV filters, composed of metal oxides, absorb or reflect UV radiation, thereby shielding the sensitive perovskite layer from penetration. Moreover, these metal oxides provide long-lasting UV protection, a benefit stemming from their compatibility with the photon energy range of 3.0–3.4 eV.…”

Section: Introductionmentioning

confidence: 99%

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Improving the Efficiency and Stability of Perovskite Solar Cells by Refining the Perovskite-Electron Transport Layer Interface and Shielding the Absorber from UV Effects

AL-Shujaa,

Zhao,

et al. 2024

ACS Appl. Mater. Interfaces

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This study aims to enhance the performance of perovskite solar cells (PSCs) by optimizing the interface between the perovskite and electron transport layers (ETLs). Additionally, we plan to protect the absorber layer from ultraviolet (UV) degradation using a ternary oxide system comprising SnO 2 , strontium stannate (SrSnO 3 ), and strontium oxide (SrO). In this structure, the SnO 2 layer functions as an electron transport layer, SrSnO 3 acts as a layer for UV filtration, and SrO is employed to passivate the interface. SrSnO 3 is characterized by its chemical stability, electrical conductivity, extensive wide band gap energy, and efficient absorption of UV radiation, all of which significantly enhance the photostability of PSCs against UV radiation. Furthermore, incorporating SrSnO 3 into the ETL improves its electronic properties, potentially raising the energy level and improving alignment, thereby enhancing the electron transfer from the perovskite layer to the external circuit. Integrating SrO at the interface between the ETL and perovskite layer reduces interface defects, thereby reducing charge recombination and improving electron transfer. This improvement results in higher solar cell efficiency, reduced hysteresis, and extended device longevity. The benefits of this method are evident in the observed improvements: a noticeable increase in open-circuit voltage (V oc ) from 1.12 to 1.16 V, an enhancement in the fill factor from 79.4 to 82.66%, a rise in the short-circuit current density (J sc ) from 24.5 to 24.9 mA/cm 2 and notably, a marked improvement in the power conversion efficiency (PCE) of PSCs, from 21.79 to 24.06%. Notably, the treated PSCs showed only a slight decline in PCE, reducing from 24.15 to 22.50% over nearly 2000 h. In contrast, untreated SnO 2 perovskite devices experienced a greater decline, with efficiency decreasing from 21.79 to 17.83% in just 580 h.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improving the Efficiency and Stability of Perovskite Solar Cells by Refining the Perovskite-Electron Transport Layer Interface and Shielding the Absorber from UV Effects

AL-Shujaa,

Zhao,

et al. 2024

ACS Appl. Mater. Interfaces

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“…[ 15–17 ] Other available methods include controlling E gap and improving stability through active structure change strategies [ 18,19 ] and concentrating photon energy through light‐emitting solar concentrators (LSC). [ 20–23 ]…”

Section: Introductionmentioning

confidence: 99%

“…[15][16][17] Other available methods include controlling E gap and improving stability through active structure change strategies [18,19] and concentrating photon energy through light-emitting solar concentrators (LSC). [20][21][22][23] Sunlight exhibits a wide range of wavelengths, from ultraviolet (UV) to infrared (IR). Notably, for OSC applications, the key is to determine the performance of conversion from solar energy into electrical energy in various environments and spaces in which the device is placed.…”

mentioning

confidence: 99%

In/Outdoor Organic Solar Cells with Effective Photon‐Harvesting by Introducing Light‐Amplification Layer with Eco‐Friendly QDs

Kim

et al. 2023

Small Structures

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Quantum dot organic solar cells (QD‐OSCs) have received considerable attention because of the luminescent property of QDs and the good miscibility due to the organic ligand in the shell. However, the use of Cd‐ or Pb‐based QDs is limited due to toxicity. Hence, Zn–Cu–In–S/ZnS QDs (ZQs) as nontoxic QDs are used in this study for the light‐amplification layer (LAL), consisting of sub‐donor (sub‐D, D18‐Cl) and QDs. The LAL applied between the hole transfer layer (HTL) and bulk heterojunction (BHJ, PM6:BTP‐eC9), ensurs effective photon amplification and high morphological stability. In particular, the ligands of ZQs constituting LAL interact with D18‐Cl and PM6:BTP‐eC9 to align molecular orientation and improve interface contact. The sub‐D/BHJ structure in which sub‐D and BHJ are introduced by layer‐by‐layer (LBL) coating method solves problems such as morphology degradation and stability degradation due to the complexity of existing ternary system. The sub‐D/BHJ, an effective ternary structure, shows a higher performance (17.06%) than the BHJ system (16.66%). Meanwhile, the LAL/BHJ shows not only the highest performance of 17.6% but also outstanding stability (93.6% after 1000 h). This study demonstrates effective energy harvesting through QDs and introduces an optimal QD‐OSCs structure strategy for high‐efficiency, high‐stability OSCs.

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“…Motivated by the fact that ECWs can operate alone or paired with other technological solutions, such as solar cells [30] and building integrated photovoltaics (BIPVs) [31], the composition of the present ECD electrolytes relied on the formulation we recently proposed for luminescent solar concentrator (LSC) [32][33][34] and luminescent down-shifting (LDS) [32] layers. We recall that LSC and LDS layers increase PV cell's UV response by down-shifting short wavelength solar radiation to longer wavelengths where the absorption of the solar cell is higher [34][35][36][37][38][39][40]. The energy of the converted photons is resonant with the absorption curves of PV devices (Fig.…”

Section: Introductionmentioning

confidence: 99%

Solar spectral management with electrochromic devices including PMMA films doped with biluminescent ionosilicas

Cardoso

Correia

Gonçalves

et al. 2021

J Sol-Gel Sci Technol

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The technological potential of poly(methyl methacrylate) (PMMA)-based composite films doped with lanthanide-doped sol-gel derived ionosilicas (IS-Ln) previously proposed for luminescent down-shifting (LDS) and luminescent solar concentrators (LSC) layers connected to photovoltaic (PV) cells is extended here to electrochromic devices (ECDs), targeting the fabrication of single energy harvesting/conversion/management LSC-LDS/PV/ECD systems. These integrated devices have foreseen application in the windows of future zero-energy buildings of smart cities. The proofof-concept is given with the report of the electro-optical performance of an ECD comprising an optimized electrolyte film composed of PMMA, IS-Nd and IS-Eu, and the 1-butyl-3methylimidazolium hexafluorophosphate ionic liquid. This amorphous electrolyte is stable below 160 ºC, exhibits high ionic conductivity (2.13 × 10 −4 and 8.76 × 10 −4 S cm −1 at room temperature and 44 ºC, respectively), and emits in the visible (red color) and near-infrared (NIR) spectral regions. The device demonstrated fast switching speed (50 s) and high transparency in the visibleto-NIR spectral regions (transmittance (T) = 79/96/89/77% at 555/1000/1500/1650 nm in the asprepared state, respectively). Upon application of ± 2.5 V for 200 cycles, at the same wavelengths the Tbleached/Tcolored values were 44/28, 46/26, 39/20 and 27/9 %, respectively, and the coloration efficiency (CE) values CEin/CEout values were −302/+181, −381/+228, −446/+267 and −734/+440 cm 2 C -1 , respectively.

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Ultraviolet-Filtering Luminescent Transparent Coatings for High-Performance PTB7-Th:ITIC–Based Organic Solar Cells

Cited by 5 publications

References 49 publications

Improving the Efficiency and Stability of Perovskite Solar Cells by Refining the Perovskite-Electron Transport Layer Interface and Shielding the Absorber from UV Effects

Improving the Efficiency and Stability of Perovskite Solar Cells by Refining the Perovskite-Electron Transport Layer Interface and Shielding the Absorber from UV Effects

In/Outdoor Organic Solar Cells with Effective Photon‐Harvesting by Introducing Light‐Amplification Layer with Eco‐Friendly QDs

Solar spectral management with electrochromic devices including PMMA films doped with biluminescent ionosilicas

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