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

---

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

Advanced Materials, Год журнала: 2022, Номер 34(33)

Опубликована: Июнь 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.

Язык: Английский

---

Single‐Junction Organic Solar Cells with 19.17% Efficiency Enabled by Introducing One Asymmetric Guest Acceptor

Advanced Materials, Год журнала: 2022, Номер 34(26)

Опубликована: Апрель 19, 2022

The ternary strategy has been widely identified as an effective approach to obtain high-efficiency organic solar cells (OSCs). However, for most OSCs, the nonradiative voltage loss lies between those of two binary devices, which limits further efficiency improvements. Herein, asymmetric guest acceptor BTP-2F2Cl is designed and incorporated into a PM1:L8-BO host blend. Compared with L8-BO neat film, L8-BO:BTP-2F2Cl blend film shows higher photoluminescence quantum yield larger exciton diffusion length. Introducing extends its absorption spectrum, improves molecular packing materials, suppresses charge recombination OSCs. Consequently, power conversion improved up 19.17% (certified value 18.7%), represents highest reported single-junction OSCs so far. results show that improving behaviors promising reducing realizing high-performance

Язык: Английский

---

Reduced non-radiative charge recombination enables organic photovoltaic cell approaching 19% efficiency

Joule, Год журнала: 2021, Номер 5(9), С. 2408 - 2419

Опубликована: Июль 23, 2021

Язык: Английский

---

Realizing 19.05% Efficiency Polymer Solar Cells by Progressively Improving Charge Extraction and Suppressing Charge Recombination

Advanced Materials, Год журнала: 2022, Номер 34(13)

Опубликована: Янв. 26, 2022

Improving charge extraction and suppressing recombination are critically important to minimize the loss of absorbed photons improve device performance polymer solar cells (PSCs). In this work, highly efficient PSCs demonstrated by progressively improving through combination side-chain engineering new nonfullerene acceptors (NFAs), adopting ternary blends, introducing volatilizable solid additives. The 2D side chains on BTP-Th induce a certain steric hindrance for molecular packing phase separation, which is mitigated fluorination BTP-FTh. Moreover, two crystalline molecules as second acceptor additive, respectively, into BTP-FTh-based host blend, crystallinity significantly improved blend morphology finely optimized. As expected, enhanced suppressed realized, contributing largely fill factor (FF) resultant devices. Accompanied open-circuit voltage (Voc ) short-circuit current density (Jsc ), record high power conversion efficiency (PCE) 19.05% realized finally.

Язык: Английский

---

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

---

Achieving 19% Power Conversion Efficiency in Planar‐Mixed Heterojunction Organic Solar Cells Using a Pseudosymmetric Electron Acceptor

Advanced Materials, Год журнала: 2022, Номер 34(32)

Опубликована: Июнь 20, 2022

A record power conversion efficiency (PCE) of over 19% is realized in planar-mixed heterojunction (PMHJ) organic solar cells (OSCs) by adopting the asymmetric selenium substitution strategy making a pseudosymmetric electron acceptor, BS3TSe-4F. The combined molecular asymmetry with more polarizable increases dielectric constant D18/BS3TSe-4F blend, helping lower exciton binding energy. On other hand, dimer packing BS3TSe-4F facilitated to enable free charge generation, efficient dissociation and lowering radiative recombination loss (ΔE2 ) OSCs. As result, PMHJ OSCs based on achieve PCE 18.48%. By incorporating another mid-bandgap acceptor Y6-O into form ternary PMHJ, higher open-circuit voltage (VOC can be achieved realize an impressive 19.03%. findings using acceptors enhancing device provides effective way develop highly materials for

Язык: Английский

---

Completely non-fused electron acceptor with 3D-interpenetrated crystalline structure enables efficient and stable organic solar cell

Nature Communications, Год журнала: 2021, Номер 12(1)

Опубликована: Авг. 24, 2021

Abstract Non-fullerene acceptors (NFAs) based on non-fused conjugated structures have more potential to realize low-cost organic photovoltaic (OPV) cells. However, their power conversion efficiencies (PCEs) are much lower than those of the fused-ring NFAs. Herein, a new bithiophene-based core (TT-P i ) featuring good planarity as well large steric hindrance was designed, which completely NFA, A4T-16, developed. The single-crystal result A4T-16 reveals that three-dimensional interpenetrating network can be formed due compact π–π stacking between adjacent end-capping groups. A high PCE 15.2% is achieved PBDB-TF:A4T-16, highest value for cells Notably, device retains ~84% its initial after 1300 h under simulated AM 1.5 G illumination (100 mW cm −2 ). Overall, this work provides insight into molecule design NFAs from aspect molecular geometry control.

Язык: Английский

---

Desired open-circuit voltage increase enables efficiencies approaching 19% in symmetric-asymmetric molecule ternary organic photovoltaics

Joule, Год журнала: 2022, Номер 6(3), С. 662 - 675

Опубликована: Фев. 25, 2022

Язык: Английский

---

Compromising Charge Generation and Recombination of Organic Photovoltaics with Mixed Diluent Strategy for Certified 19.4% Efficiency

Advanced Materials, Год журнала: 2023, Номер 35(21)

Опубликована: Март 3, 2023

The ternary blend is demonstrated as an effective strategy to promote the device performance of organic photovoltaics (OPVs) due dilution effect. While compromise between charge generation and recombination remains a challenge. Here, mixed diluent for further improving efficiency OPV proposed. Specifically, high-performance system with polymer donor, i.e., PM6, nonfullerene acceptor (NFA), BTP-eC9, diluted by diluents, which involve high bandgap NFA BTP-S17 low BTP-S16 (similar that BTP-eC9). better miscibility BTP-eC9 can dramatically enhance open-circuit voltage (VOC ), while maximizes or short-circuit current density (JSC ). interplay BTP-17 enables recombination, thus leading 19.76% (certified 19.41%), best among single-junction OPVs. Further analysis on carrier dynamics validates efficacy diluents balancing be attributed more diverse energetic landscapes improved morphology. Therefore, this work provides commercialization.

Язык: Английский

---