Organic and solution-processed tandem solar cells with 17.3% efficiency

Science, Journal Year: 2018, Volume and Issue: 361(6407), P. 1094 - 1098

Published: Aug. 9, 2018

Although organic photovoltaic (OPV) cells have many advantages, their performance still lags far behind that of other platforms. A fundamental reason for low is the charge mobility materials, leading to a limit on active-layer thickness and efficient light absorption. In this work, guided by semi-empirical model analysis using tandem cell strategy overcome such issues, taking advantage high diversity easily tunable band structure record certified 17.29% power conversion efficiency two-terminal monolithic solution-processed OPV achieved.

Language: Английский

---

Non-fullerene acceptors with branched side chains and improved molecular packing to exceed 18% efficiency in organic solar cells

Nature Energy, Journal Year: 2021, Volume and Issue: 6(6), P. 605 - 613

Published: May 10, 2021

Language: Английский

---

Over 16% efficiency organic photovoltaic cells enabled by a chlorinated acceptor with increased open-circuit voltages

Nature Communications, Journal Year: 2019, Volume and Issue: 10(1)

Published: June 7, 2019

Broadening the optical absorption of organic photovoltaic (OPV) materials by enhancing intramolecular push-pull effect is a general and effective method to improve power conversion efficiencies OPV cells. However, in terms electron acceptors, most common molecular design strategy halogenation usually results down-shifted energy levels, thereby leading decreased open-circuit voltages devices. Herein, we report chlorinated non-fullerene acceptor, which exhibits an extended meanwhile displays higher voltage than its fluorinated counterpart This unexpected phenomenon can be ascribed reduced non-radiative loss (0.206 eV). Due simultaneously improved short-circuit current density voltage, high efficiency 16.5% achieved. study demonstrates that finely tuning reduce bandgap-voltage offset has great potential for boosting efficiency.

Language: Английский

---

Solar cell efficiency tables (version 54)

Progress in Photovoltaics Research and Applications, Journal Year: 2019, Volume and Issue: 27(7), P. 565 - 575

Published: June 20, 2019

Abstract Consolidated tables showing an extensive listing of the highest independently confirmed efficiencies for solar cells and modules are presented. Guidelines inclusion results into these outlined, new entries since January 2019 reviewed.

Language: Английский

---

Alkyl Chain Tuning of Small Molecule Acceptors for Efficient Organic Solar Cells

Joule, Journal Year: 2019, Volume and Issue: 3(12), P. 3020 - 3033

Published: Oct. 7, 2019

Language: Английский

---

Recent Advances, Design Guidelines, and Prospects of All-Polymer Solar Cells

Chemical Reviews, Journal Year: 2019, Volume and Issue: 119(13), P. 8028 - 8086

Published: June 6, 2019

All-polymer solar cells (all-PSCs) consisting of polymer donors (PDs) and acceptors (PAs) have drawn tremendous research interest in recent years. It is due to not only their tunable optical, electrochemical, structural properties, but also many superior features that are readily available conventional polymer-fullerene (fullerene-PSCs) including long-term stability, synthetic accessibility, excellent film-forming properties suitable for large-scale manufacturing. Recent breakthroughs material design device engineering driven the power conversion efficiencies (PCEs) all-PSCs exceeding 11%, which comparable performance fullerene-PSCs. Furthermore, outstanding mechanical durability stretchability been reported all-PSCs, make them stand out from other small molecule-based PSCs as a promising supplier wearable electronic devices. This review provides comprehensive overview important work pertinent examples deliberately chosen. First, we describe key components enabled progresses rational rules efficient PDs PAs, blend morphology control, light harvesting engineering. We on understanding stability under various external conditions, highlights importance future implementation commercialization. Finally, because yet achieved full potential still undergoing rapid development, offer our views current challenges prospects.

Language: Английский

---

Renewed Prospects for Organic Photovoltaics

Chemical Reviews, Journal Year: 2022, Volume and Issue: 122(18), P. 14180 - 14274

Published: Aug. 5, 2022

Organic photovoltaics (OPVs) have progressed steadily through three stages of photoactive materials development: (i) use poly(3-hexylthiophene) and fullerene-based acceptors (FAs) for optimizing bulk heterojunctions; (ii) development new donors to better match with FAs; (iii) non-fullerene (NFAs). The application NFAs an A–D–A configuration (where A = acceptor D donor) has enabled devices efficient charge generation small energy losses (Eloss < 0.6 eV), resulting in substantially higher power conversion efficiencies (PCEs) than FA-based devices. discovery Y6-type (Y6 2,2′-((2Z,2′Z)-((12,13-bis(2-ethylhexyl)-3,9-diundecyl-12,13-dihydro-[1,2,5]-thiadiazolo[3,4-e]-thieno[2″,3″:4′,5′]thieno-[2′,3′:4,5]pyrrolo-[3,2-g]thieno-[2′,3′:4,5]thieno-[3,2-b]indole-2,10-diyl)bis(methanylylidene))bis(5,6-difluoro-3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile) A–DA′ D–A further propelled the PCEs go beyond 15% due smaller Eloss values (∼0.5 eV) external quantum efficiencies. Subsequently, Y6-series single-junction increased >19% may soon approach 20%. This review provides update recent progress OPV following aspects: developments novel donors, understanding structure–property relationships underlying mechanisms state-of-the-art OPVs, tasks underpinning commercialization such as device stability, module development, potential applications, high-throughput manufacturing. Finally, outlook prospects section summarizes remaining challenges technology.

Language: Английский

---

Delocalization of exciton and electron wavefunction in non-fullerene acceptor molecules enables efficient organic solar cells

Nature Communications, Journal Year: 2020, Volume and Issue: 11(1)

Published: Aug. 7, 2020

Abstract A major challenge for organic solar cell (OSC) research is how to minimize the tradeoff between voltage loss and charge generation. In early 2019, we reported a non-fullerene acceptor (named Y6) that can simultaneously achieve high external quantum efficiency low OSC. Here, use combination of experimental theoretical modeling reveal structure-property-performance relationships this state-of-the-art OSC system. We find distinctive π–π molecular packing Y6 not only exists in single crystals but also thin films. Importantly, such leads (i) formation delocalized emissive excitons enable small non-radiative loss, (ii) delocalization electron wavefunctions at donor/acceptor interfaces significantly reduces Coulomb attraction interfacial electron-hole pairs. These properties are critical enabling highly efficient generation systems with negligible donor-acceptor energy offset.

Language: Английский

---

Organic Photodetectors for Next‐Generation Wearable Electronics

Advanced Materials, Journal Year: 2019, Volume and Issue: 32(15)

Published: Aug. 1, 2019

Abstract Next‐generation wearable electronics will need to be mechanically flexible and stretchable such that they can conformally attached onto the human body. Photodetectors are available in today's market based on rigid inorganic crystalline materials have limited mechanical flexibility. In contrast, photodetectors organic polymers molecules emerged as promising alternatives due their inherent softness, ease of processing, tunable optoelectronic properties, good light sensing performance, biocompatibility. Here, recent advances terms both properties outlined discussed, application including health monitoring sensors, artificial vision, self‐powering integrated devices highlighted.

Language: Английский

---

Binary Organic Solar Cells Breaking 19% via Manipulating the Vertical Component Distribution

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(33)

Published: June 24, 2022

The variation of the vertical component distribution can significantly influence photovoltaic performance organic solar cells (OSCs), mainly due to its impact on exciton dissociation and charge-carrier transport recombination. Herein, binary devices are fabricated via sequential deposition (SD) D18 L8-BO materials in a two-step process. Upon independently regulating spin-coating speeds each layer deposition, optimal SD device shows record power conversion efficiency (PCE) 19.05% for single-junction OSCs, much higher than that corresponding blend casting (BC) (18.14%). Impressively, this strategy presents excellent universality boosting devices, exemplified by several nonfullerene acceptor systems. mechanism studies reveal with preferred components possesses high crystallinity, efficient splitting, low energy loss, balanced charge transport, resulting all-around enhancement performances. This work provides valuable approach high-efficiency shedding light understanding relationship between distribution.

Language: Английский

---