Renewed Prospects for Organic Photovoltaics

Chemical Reviews, Год журнала: 2022, Номер 122(18), С. 14180 - 14274

Опубликована: Авг. 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.

Язык: Английский

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Cathode engineering with perylene-diimide interlayer enabling over 17% efficiency single-junction organic solar cells

Nature Communications, Год журнала: 2020, Номер 11(1)

Опубликована: Июнь 1, 2020

Abstract In organic solar cells (OSCs), cathode interfacial materials are generally designed with highly polar groups to increase the capability of lowering work function cathode. However, strong group could result in a high surface energy and poor physical contact at active layer surface, posing challenge for interlayer engineering address trade-off between device stability efficiency. Herein, we report hydrogen-bonding material, aliphatic amine-functionalized perylene-diimide (PDINN), which simultaneously down-shifts air stable cathodes (silver copper), maintains good layer. The OSCs based on PDINN engineered silver-cathode demonstrate power conversion efficiency 17.23% (certified value 16.77% by NREL) stability. Our results indicate that is an effective material via suitable intermolecular interactions feasible approach improve performance OSCs.

Язык: Английский

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New Phase for Organic Solar Cell Research: Emergence of Y-Series Electron Acceptors and Their Perspectives

ACS Energy Letters, Год журнала: 2020, Номер 5(5), С. 1554 - 1567

Опубликована: Апрель 7, 2020

With the recent emergence of a new class high-performance nonfullerene acceptors (NFAs), organic solar cells (OSCs) have entered phase research featuring high power conversion efficiencies (PCEs). In this Perspective, we summarize progress made from Y-series NFAs and matched polymer donors analyze molecular design strategies for boosting device performance. We also perform PCE prediction OSCs propose requirements NFAs, aiming at 20%, which is comparable to those Si perovskite-based counterparts. Finally, assess three factors efficiency, stability, cost outline challenges facing future development directions OSCs. This work expected provide valuable suggestions with comprehensive view advance practical application

Язык: Английский

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Layer‐by‐Layer Processed Ternary Organic Photovoltaics with Efficiency over 18%

Advanced Materials, Год журнала: 2021, Номер 33(12)

Опубликована: Фев. 18, 2021

Abstract Obtaining a finely tuned morphology of the active layer to facilitate both charge generation and extraction has long been goal in field organic photovoltaics (OPVs). Here, solution resolve above challenge via synergistically combining layer‐by‐layer (LbL) procedure ternary strategy is proposed demonstrated. By adding an asymmetric electron acceptor, BTP‐S2, with lower miscibility binary donor:acceptor host PM6:BO‐4Cl, vertical phase distribution can be formed donor‐enrichment at anode acceptor‐enrichment cathode OPV devices during LbL processing. In contrast, LbL‐type OPVs based on PM6:BO‐4Cl still show bulk‐heterojunction like morphology. The formation not only reduce recombination but also promote collection, thus enhancing photocurrent fill factor OPVs. Consequently, exhibit best efficiency 18.16% (certified: 17.8%), which among highest values reported date for work provides facile effective approach achieving high‐efficiency expected morphologies, demonstrates as being promising fabricating from present laboratory study future industrial production.

Язык: Английский

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Organic Solar Cells with 18% Efficiency Enabled by an Alloy Acceptor: A Two‐in‐One Strategy

Advanced Materials, Год журнала: 2021, Номер 33(27)

Опубликована: Май 28, 2021

Abstract The trade‐off between the open‐circuit voltage ( V oc ) and short‐circuit current density J sc has become core of organic photovoltaic research, realizing minimum energy offsets that can guarantee effective charge generation is strongly desired for high‐performance systems. Herein, a ternary solar cell with power conversion efficiency over 18% using large‐bandgap polymer donor, PM6, small‐bandgap alloy acceptor containing two structurally similar nonfullerene acceptors (Y6 AQx‐3) reported. This system take full advantage irradiation forms favorable morphology. By varying ratio acceptors, delicate regulation levels achieved, thereby affecting dynamics in devices. optimal device exhibits more efficient hole transfer exciton separation than PM6:AQx‐3‐based reduced loss compared PM6:Y6‐based system, contributing to better performance. Such “two‐in‐one” strategy, which synergizes highly compatible provides promising path boosting performance

Язык: Английский

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A Well‐Mixed Phase Formed by Two Compatible Non‐Fullerene Acceptors Enables Ternary Organic Solar Cells with Efficiency over 18.6%

Advanced Materials, Год журнала: 2021, Номер 33(33)

Опубликована: Июль 10, 2021

Abstract The ternary strategy, introducing a third component into binary blend, opens simple and promising avenue to improve the power conversion efficiency (PCE) of organic solar cells (OSCs). judicious selection an appropriate component, without sacrificing photocurrent voltage output OSC, is significant importance in devices. Herein, highly efficient OSCs fabricated using approach are demonstrated, wherein novel non‐fullerene acceptor L8‐BO‐F designed incorporated PM6:BTP‐eC9 blend. three components show complementary absorption spectra cascade energy alignment. BTP‐eC9 found form homogeneous mixed phase, which improves molecular packing both donor materials, optimizes blend morphology. Moreover, addition suppresses non‐radiative recombination, thus leading reduced loss. Consequently, concurrent increases open‐circuit voltage, short‐circuit current, fill factor realized, resulting unprecedented PCE 18.66% (certified value 18.2%), represents highest values reported for single‐junction tandem so far.

Язык: Английский

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Manipulating the D:A interfacial energetics and intermolecular packing for 19.2% efficiency organic photovoltaics

Energy & Environmental Science, Год журнала: 2022, Номер 15(6), С. 2537 - 2544

Опубликована: Янв. 1, 2022

A novel electron acceptor, BTP-H2, demonstrates a high efficiency of 18.5% with V oc 0.932 V. It also enables the ternary device to yield an 19.2%, ranking highest among single-junction organic photovoltaics.

Язык: Английский

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Precisely Controlling the Position of Bromine on the End Group Enables Well‐Regular Polymer Acceptors for All‐Polymer Solar Cells with Efficiencies over 15%

Advanced Materials, Год журнала: 2020, Номер 32(48)

Опубликована: Окт. 29, 2020

Recent advances in the development of polymerized A-D-A-type small-molecule acceptors (SMAs) have promoted power conversion efficiency (PCE) all-polymer solar cells (all-PSCs) over 13%. However, monomer an SMA typically consists a mixture three isomers due to regio-isomeric brominated end groups (IC-Br(in) and IC-Br(out)). In this work, two isomeric are successfully separated, regioisomeric issue is solved, polymer acceptors, named PY-IT, PY-OT, PY-IOT, developed, where PY-IOT random terpolymer with same ratio acceptors. Interestingly, from absorption edge gradually redshifts electron mobility progressively increases. Theory calculation indicates that LUMOs distributed on entire molecular backbone contributing enhanced transport. Consequently, PM6:PY-IT system achieves excellent PCE 15.05%, significantly higher than those for PY-OT (10.04%) (12.12%). Morphological device characterization reveals highest PY-IT-based fruit absorption, more balanced charge transport, favorable morphology. This work demonstrates site polymerization SMAs strongly affects performance, offering insights into efficient all-PSCs.

Язык: Английский

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A critical review on semitransparent organic solar cells

Nano Energy, Год журнала: 2020, Номер 78, С. 105376 - 105376

Опубликована: Сен. 15, 2020

Язык: Английский

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Perovskite–organic tandem solar cells with indium oxide interconnect

Nature, Год журнала: 2022, Номер 604(7905), С. 280 - 286

Опубликована: Апрель 13, 2022

Язык: Английский

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