All Slot‐Die Coated Non‐Fullerene Organic Solar Cells with PCE 11%

Chaturvedi, Neha; Gasparini, Nicola; Corzo, Daniel; Bertrandie, Jules; Wehbe, Nimer; Troughton, Joel; Baran, Derya

doi:10.1002/adfm.202009996

Cited by 65 publications

(79 citation statements)

References 47 publications

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“…Transparent and semitransparent PVs have also experienced significant progress recently, resulting in 35 new emerging cell reports out of a total 117 (24%; see Figure 5 ). Most impressively, a new top LUE = 5.46% champion transparent solar cell has been reported for an OPV [ 43 ] with an efficiency of 9.1% over an AVT of 60% and an OpF of 57%. This was the result of an optimization of a sequential deposition process of transport and active layers in PTB7‐Th:IEICO‐4F‐based cells with slot‐die coating, [ 43 ] which consolidates OPV as the most promising technology in the research field of high AVT cells.…”

Section: Transparent and Semitransparent Pvs: Best Research Solar Cellsmentioning

confidence: 99%

“…Most impressively, a new top LUE = 5.46% champion transparent solar cell has been reported for an OPV [ 43 ] with an efficiency of 9.1% over an AVT of 60% and an OpF of 57%. This was the result of an optimization of a sequential deposition process of transport and active layers in PTB7‐Th:IEICO‐4F‐based cells with slot‐die coating, [ 43 ] which consolidates OPV as the most promising technology in the research field of high AVT cells. Compared to the next LUE champion, a 2.35 eV bandgap PSC, [ 44 ] the organic solar cell had a bandgap of about 1.3 eV, clearly indicating the superiority of selective absorbers for transparent devices.…”

Section: Transparent and Semitransparent Pvs: Best Research Solar Cellsmentioning

confidence: 99%

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Device Performance of Emerging Photovoltaic Materials (Version 2)

Almora

Baran

Bazan

et al. 2021

Advanced Energy Materials

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Following the 1st release of the “Emerging photovoltaic (PV) reports”, the best achievements in the performance of emerging photovoltaic devices in diverse emerging photovoltaic research subjects are summarized, as reported in peer‐reviewed articles in academic journals since August 2020. Updated graphs, tables, and analyses are provided with several performance parameters, e.g., power conversion efficiency, open‐circuit voltage, short‐circuit current density, fill factor, light utilization efficiency, and stability test energy yield. These parameters are presented as a function of the photovoltaic bandgap energy and the average visible transmittance for each technology and application and are put into perspective using, e.g., the detailed balance efficiency limit. The 2nd instalment of the “Emerging PV reports” extends the scope toward tandem solar cells and presents the current state‐of‐the‐art in tandem solar cell performance for various material combinations.

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Section: Transparent and Semitransparent Pvs: Best Research Solar Cellsmentioning

confidence: 99%

Section: Transparent and Semitransparent Pvs: Best Research Solar Cellsmentioning

confidence: 99%

Device Performance of Emerging Photovoltaic Materials (Version 2)

Almora

Baran

Bazan

et al. 2021

Advanced Energy Materials

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“…Scalable wet deposition technologies, such as spray-coating, gravure, slot-die coating, meniscusguided coating etc. are considered amongst the most important, technologically-relevant strategies of fabrication of organic, thin-film based electronic devices (Hwang, Bae, and Kim 2014;Koutsiaki et al, 2019;Chen et al, 2020;Chaturvedi et al, 2021;Michels et al, 2021). Formation of the solid films upon any wet deposition process can be considered a problem of a crystallization of solution components at the solid surface.…”

Section: Introductionmentioning

confidence: 99%

Electron-to Hole Transport Change Induced by Solvent Vapor Annealing of Naphthalene Diimide Doped with Poly(3-Hexylthiophene)

et al. 2021

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Herein we report on fabrication and properties of organic field-effect transistors (OFETs) based on the spray-coated films of N,N′-dioctyl naphthalene diimide (NDIC8) doped with 2.4 wt% of poly (3-hexylthiophene) (P3HT). OFETs with the untreated NDIC8:P3HT films revealed electron conductivity [μe* = 5 × 10–4 cm2×(Vs)−1]. After the annealing in chloroform vapor the NDIC8:P3HT films revealed the hole transport only [μh* = 0.9 × 10–4 cm2×(Vs)−1]. Due to the chemical nature and energy levels, the hole transport was not expected for NDIC8-based system. Polarized optical- and scanning electron microscopies indicated that the solvent vapor annealing of the NDIC8:P3HT films caused a transition of their fine-grained morphology to the network of branched, dendritic crystallites. Grazing incidence wide-angle X-ray scattering studies indicated that the above transition was accompanied by a change in the crystal structure of NDIC8. The isotropic crystal structure of NDIC8 in the untreated film was identical to the known crystal structure of the bulk NDIC8. After the solvent annealing the crystal structure of NDIC8 changed to a not-yet-reported polymorph, that, unlike in the untreated film, was partially oriented with respect to the OFET substrate.

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“…Slot-Die Coating (SDC) has been identified as a viable coating technique due to its inherent scalability, compatibility with roll-to-roll manufacturing, and a much reduced material waste compared to spin-coating. [13] It is estimated that 95-98% of material is wasted using spin-coating methods. [14] In addition, SDC is effective for high throughput film formation on flexible substrates, while maintaining control over film thickness.…”

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confidence: 99%

“…This is encouraging for commercialization, but performance gaps exist between engineered lab-scale devices and roll-processed modules. [13,[18][19][20] It is critical that when developing roll-to-roll compatible coated OPV devices, all layers must be considered in the stack, not just the organic photoactive layer, which is most often only investigated. Although reported by some, the SDC of all three critical OPV layers (hole transport layer HTL, electron transport ETL, photoactive layer) remains largely unexplored in the academic literature using NFAs.…”

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confidence: 99%

Ambient Condition, Three‐Layer Slot‐Die Coated Organic Photovoltaics with PCE of 10%

Tintori

Welch

2021

Adv Materials Inter

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Most high-performance OPV devices, however, use fabrication methods that are only suitable for small-scale laboratory experiments, such as spin-coating, alongside controlled atmospheric conditions in gloveboxes for both fabrication and testing. [1][2][3][4]10] In addition, the halogenated and volatile solvent chloroform is commonly used, despite it not being industrially viable. This is due to adverse health and environmental effects, as well as poor compatibility with printing methods due to the low boiling point and high volatility. Thermal procedures such as hot casting and thermal annealing are also used to process and cure the photoactive layer, respectively, of such OPVs devices, [12] which introduces energy-intensive steps during the fabrication process. To facilitate the lab-to-fab transition, it is necessary to move high-performance systems to industry-compatible processing. Slot-Die Coating (SDC) has been identified as a viable coating technique due to its inherent scalability, compatibility with roll-to-roll manufacturing, and a much reduced material waste compared to spin-coating. [13] It is estimated that 95-98% of material is wasted using spin-coating methods. [14] In addition, SDC is effective for high throughput film formation on flexible substrates, while maintaining control over film thickness. [15] SDC has challenges in controlling drying rates which impact film morphology, [16] but offers opportunities for efficient layer-by-layer coating. [17] Increased effort has been put towards the construction of OPV devices using industrially compatible conditions, that is, OPV at scale. This is encouraging for commercialization, but performance gaps exist between engineered lab-scale devices and roll-processed modules. [13,[18][19][20] It is critical that when developing roll-to-roll compatible coated OPV devices, all layers must be considered in the stack, not just the organic photoactive layer, which is most often only investigated. Although reported by some, the SDC of all three critical OPV layers (hole transport layer HTL, electron transport ETL, photoactive layer) remains largely unexplored in the academic literature using NFAs. This has been presented by Baran and co-workers, [13] and it remains a challenge to prepare multilayer SDC OPVs with high efficiency. [21,22] Encouraging, Destouesse et al., have demonstrated roll-to-roll processed, ITO-free OPVs based on NFAs, in air, with 5% PCE. [23] For single-layer SDC OPVs we have reported PCEs upwards of 6%, [24][25][26] while PCEs upwards of 12% have been reached. [12,27,28] For two-and three-layer SDC

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All Slot‐Die Coated Non‐Fullerene Organic Solar Cells with PCE 11%

Cited by 65 publications

References 47 publications

Device Performance of Emerging Photovoltaic Materials (Version 2)

Device Performance of Emerging Photovoltaic Materials (Version 2)

Electron-to Hole Transport Change Induced by Solvent Vapor Annealing of Naphthalene Diimide Doped with Poly(3-Hexylthiophene)

Ambient Condition, Three‐Layer Slot‐Die Coated Organic Photovoltaics with PCE of 10%

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