In Situ Probing the Crystallization Kinetics in Gas‐Quenching‐Assisted Coating of Perovskite Films

Advanced Energy Materials, Год журнала: 2024, Номер 14(10)

Опубликована: Янв. 7, 2024

Abstract The pursuit of commercializing perovskite photovoltaics is driving the development various scalable crystallization techniques. Among them, gas quenching a promising approach for high‐throughput deposition films. However, films prepared by gas‐quenching assisted blade coating are susceptible to formation pinholes and frequently show inferior crystallinity if interplay between film coating, drying, kinetics not fully optimized. That arguably requires thorough understanding how single processing steps influence printed Here, in situ optical spectroscopies integrated into doctor‐blading setup that allows real‐time monitor during process. It found essential role treatment achieving smooth compact controlling nucleation rate. Moreover, with assistance phase‐field simulations, excessive methylammonium iodide revealed increase grain size accelerating crystal growth These results tailored control rate critical optimal quality, leading solar cells champion power conversion efficiency 19.50% mini modules 15.28% achieved.

Язык: Английский

---

A digital twin to overcome long-time challenges in photovoltaics

Joule, Год журнала: 2024, Номер unknown

Опубликована: Янв. 1, 2024

Язык: Английский

---

Autonomous Optimization of Air‐Processed Perovskite Solar Cell in a Multidimensional Parameter Space

Advanced Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 2, 2025

Abstract Traditional optimization methods often face challenges in exploring complex process parameter spaces, which typically result suboptimal local maxima. Here an autonomous framework driven by a machine learning (ML)‐guided automated platform is introduced to optimize the fabrication conditions of additive‐ and passivation‐free perovskite solar cells (PSCs) under ambient conditions. By effectively 6D space, this method identifies five sets achieving efficiencies above 23%, with peak efficiency 23.7% limited experimental budgets. Feature importance analysis indicates that rotation speeds during first second steps processing are most influential factors affecting device performance, thereby meriting prioritization efforts. These results demonstrate exceptional capability addressing its potential advance photovoltaic technology. Beyond PSCs, work provides reliable comprehensive strategy for optimizing solution‐processed semiconductors highlights broader applications methodologies materials science.

Язык: Английский

---

Pathways to Upscaling Highly Efficient Organic Solar Cells Using Green Solvents: A Study on Device Photophysics in the Transition from Lab‐to‐Fab

Advanced Science, Год журнала: 2024, Номер 11(31)

Опубликована: Июнь 17, 2024

Abstract As the rise of nonfullerene acceptors (NFA) has allowed lab‐scale organic solar cells (OSC) to reach 20% efficiency, translating these devices into roll‐to‐roll compatible fabrication still poses many challenges for researchers. Among are use green solvent solubility large‐scale manufacture, fabrication, and, not least, information on charge carrier dynamics in each upscaling step, further understand gap performance. In this work, reproducibility champion using slot‐die coating with 14% power conversion efficiency (PCE) is demonstrated, under condition that optimal thickness maintained. It shown donor:acceptor (D:A) blend PM6:Y12, processing a more significant impact compared deposition technique. found processed o‐xylene feature 40% decrease bimolecular recombination coefficient those CB, as well 70% increase effective mobility. Finally, it highlighted blade‐coating yields similar coating, making choice optimization no loss translation toward up‐scale.

Язык: Английский

---

Fully printed flexible perovskite solar modules with improved energy alignment by tin oxide surface modification

Energy & Environmental Science, Год журнала: 2024, Номер 17(19), С. 7097 - 7106

Опубликована: Янв. 1, 2024

Fully printed carbon-based flexible perovskite module with an efficiency of 11.6%.

Язык: Английский

---

A Pyrazinyl Wide‐Bandgap Polymer Donor Yields 19.35% Efficiency in Tandem Organic Solar Cells

Advanced Energy Materials, Год журнала: 2024, Номер 14(42)

Опубликована: Авг. 3, 2024

Abstract In series‐connected tandem organic solar cells (TOSCs), various light‐harvesting molecules with complementary absorptions are explored the aim of collaboratively utilizing light to maximum extent. sharp contrast small molecular acceptors that possessing almost successively tunable bandgaps, high‐performance wide‐bandgap (WBG) polymer donors in TOSCs quite scarce, only PM6 (optical E g opt = 1.80 eV) and D18 ( 1.98 being widely used. Herein, develop WBG large open‐circuit voltages V OC ) high‐energy photon absorption, two pyrazinyl donors, PPy1 PPy2, synthesized branched 2‐butyloctyl n‐dodecyl chains on polymeric backbones, respectively, demonstrating downshifted highest occupied orbital energy levels ≈−5.60 eV thus afford over 2.0 eV. Consequently, when blending a acceptor F‐ThCl, PPy2:F‐ThCl‐based devices exhibit higher power conversion efficiency (PCE) 14.50% fill factor 77.66%. its 1.07 V, based PPy2 further fabricated an impressive PCE 19.35% by using narrow bandgap blend PM6:CH1007:F‐2F as rear cell. This work demonstrates great potential pyrazine units constructing for achieving record‐breaking TOSCs.

Язык: Английский

---

Printing and Coating Techniques for Scalable Organic Photovoltaic Fabrication

Materials, Год журнала: 2024, Номер 17(11), С. 2511 - 2511

Опубликована: Май 23, 2024

Within recent years, there has been an increased interest towards organic photovoltaics (OPVs), especially with their significant device performance reaching beyond 19% since 2022. With these advances in the of laboratory-scaled OPVs, also more attention directed using printing and coating methods that are compatible large-scale fabrication. Though large-area (>100 cm2) OPVs have reached efficiency 15%, this is still behind laboratory-scale OPVs. There needs to be focus on determining strategies for improving lifetime suitable scalable manufacturing, as well reducing material manufacturing costs. In paper, we compare several employed fabricate main deposition active layer. This includes a comparison performances at laboratory (<1 cm2), small (1–10 medium (10–100 large area fabrications, encompassing devices use only layer, “fully printed/coated” devices. The article compares research each techniques predicts general direction will head towards.

Язык: Английский

---

Tin Oxide: The Next Benchmark Transport Material for Organic Solar Cells?

ACS Energy Letters, Год журнала: 2025, Номер 10(3), С. 1330 - 1337

Опубликована: Фев. 20, 2025

Organic solar cells (OSCs) are one of the most promising emerging photovoltaic technologies due to rapid increase in efficiency recent years. While efficiencies over 20% have been reported laboratory scale devices using conventional (p-i-n) structure, OSCs with inverted (n-i-p) structures still underperform, reaching values around 18%. Tin oxide (SnO2) has recently emerged as a transport layer for OSCs. Yet, some reproducibility challenges shown by literature hindered full adaptation this electron (ETL) organic cell community. This Perspective evaluates current status investigation SnO2 OSCs, focusing on its integration into state-of-the-art systems and highlighting toward implementation. We examine which strategies lead efficient stable give critical view whether material can soon become next benchmark

Язык: Английский

---

Graded Roll‐to‐Roll Slot Die Coating for High‐Throughput Catalyst Layer Studies

ChemElectroChem, Год журнала: 2025, Номер unknown

Опубликована: Март 12, 2025

Abstract Fuel cells play a key role in the energy transition to renewable resources. Many of these systems are based on substrates coated with thin layers containing catalyst, ionomer or support material like carbon. In order experimentally define optimal catalyst layer configuration, one must do step‐by‐step variations its components. Currently this be done several single coating experiments. Here we present tabletop roll‐to‐roll (R2R) slot die setup for producing wet film graded high‐throughput loading studies. presented work perform study proton exchange membrane fuel cell (PEMFC) cathodes where all investigated loadings result from coating. The thickness is measured during continuous process via in‐line confocal sensors and correlated by area X‐ray fluorescence (XRF) scans. Small sections coatings were tested full PEMFC 5 cm 2 active area. known dependency performance was shown compared previous results show successful fabrication which can used both, facilitate materials development increase stacks.

Язык: Английский

---

Controlling Morphology and Improving Stability with High-Boiling-Point Additive for Efficient Organic Solar Cells

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Март 17, 2025

The rapid advancement of solar photovoltaic technology underscores the growing significance organic cells (OSCs) in renewable energy solutions. A critical challenge optimizing OSC performance lies achieving precise control over active layer nanomorphology. In this study, we innovatively introduce a high-boiling-point liquid additive, 1,2,4-trichlorobenzene (1,2,4-TCB), as superior alternative to conventional additive 1,8-diiodooctane (DIO). Compared DIO, 1,2,4-TCB significantly enhances molecular ordering acceptors and improves miscibility between donor (D18) acceptor (Y6) materials, leading notable increase power conversion efficiency (PCE) from 17.56% 18.80%. It has been revealed that promotes packing, particularly for molecules grazing incidence wide-angle X-ray scattering. contact angle measurements further demonstrate improved donor–acceptor miscibility, resulting an optimized bicontinuous interpenetrating network morphology. This morphology effectively exciton separation, facilitates charge transport, minimizes recombination losses. addition improvements, 1,2,4-TCB-based devices exhibit exceptional photostability (T80 = 981 h) storage stability 2708 h), outperforming their DIO-based counterparts. These findings not only establish potential additives like boosting but also provide promising strategy advance commercial viability technology.

Язык: Английский

---