Extended Short‐Wave Infrared Colloidal Quantum Dot Lasers with Nanosecond Excitation DOI
Guy L. Whitworth, Carmelita Rodà, Mariona Dalmases

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 6, 2024

Abstract Solution‐processed gain media have great technological potential as lasers due to their ease of integration with on‐chip photonics, scalability and tuneable optoelectronic properties. Currently, the spectral coverage solution‐processed extends from visible up telecom wavelengths in short‐wave infrared (SWIR) (<1650 nm). Here, optical extended SWIR 1600 nm 2500 is demonstrated, using PbSbased colloidal quantum dots (CQDs). This region has many applications such LIDAR, biological imaging environmental monitoring currently served by exotic, costly materials limitedscalability. Using CQDs distributed feedback laser cavities, lasing emission tuned between 2150 reported. We show that increased absorption cross‐section larger CQDs, threshold reduced a factor 36 compared smaller‐sized reaching an amplified spontaneous (ASE) down 42 µJ cm −2 . Furthermore, under nanosecond excitation are demonstrated for first time PbS use transient spectroscopy data model thresholds. paves way realizing compact practical CQD potentially toward electrically driven diodes.

Language: Английский

4-T CdTe/Perovskite Thin Film Tandem Solar Cells with Efficiency >24% DOI
Ananta Paul, Abhijit Singha, Kashimul Hossain

et al.

ACS Energy Letters, Journal Year: 2024, Volume and Issue: 9(6), P. 3019 - 3026

Published: May 29, 2024

An integration of perovskite and cadmium telluride (CdTe) solar cells in a tandem configuration has the potential to yield efficient thin-film cells. Owing promise higher efficiency at low cost, presented study aims explore for combining this commercially established CdTe photovoltaics (PV) with next-generation PV. Here, we developed four-terminal (4-T) CdTe/perovskite cells, starting 18.3% near-infrared-transparent (NIR-TPSCs) an average transmission (Tavg) 24.76% 300–900 nm wavelength range. These were then integrated 19.56% opaque achieving 23.42% 4-T configuration. Additionally, using refractive index matching liquid increases overall power conversion (PCE) 24.2%. This pioneering achievement marks first instance cell exceeding PCE 24.2%, significant 123.72% increase PCE.

Language: Английский

Citations

12
Challenges and opportunities in high efficiency scalable and stable perovskite solar cells DOI
Kashimul Hossain,

S. Nayak,

Dinesh Kabra

et al.

Applied Physics Letters, Journal Year: 2024, Volume and Issue: 125(17)

Published: Oct. 21, 2024

Perovskite solar cells (PSCs) are the fastest-growing photovoltaic (PV) technology and hold great promise for industry due to their low-cost fabrication excellent efficiency. To achieve commercial readiness level, most important factor would be yield beyond 95% at PSC module levels. The current essential requirements PSCs reproducibility of high efficiency devices, scalability, stability. reported certified (24–26%) results based on use FAPbI3 perovskites with a bandgap Eg≈ 1.5 eV, typical device's active area ranges from ≈ 0.1 cm2 maximum 1 cm2. However, relatively higher essential, especially in tandem cell applications. Hence, optimization is necessity. As increases, goes down reduced JSC increased VOC loss. Therefore, understanding loss mechanism corresponding solutions need developed. Scaling up without compromising fill and, hence, non-trivial. So, large devices crucial. stability analysis literature inconsistent, preventing data comparison identifying various degradation factors or failure mechanisms. Moreover, how accelerated tests useful predicting real lifetime yet knowledge technological gaps between laboratory industry-scale production crucial further development. this review article, we discuss challenges opportunities scalable stable PSCs.

Language: Английский

Citations

4
Near ideal photoluminescence in perovskites: Excitonic effects and self-consistent back extraction of recombination parameters DOI Creative Commons
Pradeep R. Nair

Journal of Applied Physics, Journal Year: 2025, Volume and Issue: 137(8)

Published: Feb. 25, 2025

Recent reports indicate that perovskite-based light emitting diodes (LEDs) have achieved an external quantum efficiency (EQE) of 32%—rather internal close to 100%. Much this improved performance is attributed the role excitons. While experimental trends are encouraging, recombination parameters estimated through extensive curve-fitting photoluminescence transients often not amenable reasonable interpretations. In view same, a detailed analysis free carrier–exciton dynamics in perovskite optoelectronic materials, here we identify coherent scheme unambiguously back extract relevant parameters. The model predictions compare well with recent results on LEDs record EQE, thus quantifying Importantly, work identifies physics aware for design experiments tailored toward consistent exploration underlying physical mechanisms and hence could enable synergistic optimization process technology device performance.

Language: Английский

Citations

0
Decoding recombination dynamics in perovskite solar cells: an in-depth critical review DOI
Ramkrishna Das Adhikari, Mayur Jagdishbhai Patel, Himangshu Baishya

et al.

Chemical Society Reviews, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

This review systematically analyses the recombination pathways in PSCs, unveils cutting-edge suppression strategies, and underscores potential of ML optimizing device performance expediting commercial integration.

Language: Английский

Citations

0
Low dark current with high-speed detection in a scalable perovskite photodetector DOI Creative Commons
Kashimul Hossain, Bhupesh Bhardwaj, Dinesh Kabra

et al.

Device, Journal Year: 2024, Volume and Issue: 2(11), P. 100513 - 100513

Published: Aug. 23, 2024

Language: Английский

Citations

2
Recombination Resistance Identification through Current-Voltage Curve Reconstruction in Perovskite Solar Cells DOI Creative Commons
Pablo F. Betancur, Omar E. Solis,

Rafael Abargues

et al.

Physical Chemistry Chemical Physics, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

Coupled recombination and transport/extraction resistances in equivalent circuits of perovskite solar cells can obscure key photovoltaic processes impedance spectroscopy. j – V curve reconstruction serves as a tool for identifying resistance.

Language: Английский

Citations

2
Extended Short‐Wave Infrared Colloidal Quantum Dot Lasers with Nanosecond Excitation DOI
Guy L. Whitworth, Carmelita Rodà, Mariona Dalmases

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 6, 2024

Abstract Solution‐processed gain media have great technological potential as lasers due to their ease of integration with on‐chip photonics, scalability and tuneable optoelectronic properties. Currently, the spectral coverage solution‐processed extends from visible up telecom wavelengths in short‐wave infrared (SWIR) (<1650 nm). Here, optical extended SWIR 1600 nm 2500 is demonstrated, using PbSbased colloidal quantum dots (CQDs). This region has many applications such LIDAR, biological imaging environmental monitoring currently served by exotic, costly materials limitedscalability. Using CQDs distributed feedback laser cavities, lasing emission tuned between 2150 reported. We show that increased absorption cross‐section larger CQDs, threshold reduced a factor 36 compared smaller‐sized reaching an amplified spontaneous (ASE) down 42 µJ cm −2 . Furthermore, under nanosecond excitation are demonstrated for first time PbS use transient spectroscopy data model thresholds. paves way realizing compact practical CQD potentially toward electrically driven diodes.

Language: Английский

Citations

0