Selenium-Containing Organic Photovoltaic Materials DOI
Baobing Fan, Francis Lin, Xin Wu

et al.

Accounts of Chemical Research, Journal Year: 2021, Volume and Issue: 54(20), P. 3906 - 3916

Published: Oct. 4, 2021

ConspectusOrganic photovoltaics (OPVs) with a photoactive layer containing blend of organic donor and acceptor species are considered to be promising technology for clean energy owing their unique flexible form factor good solution processability that can potentially address the scalability challenges. The delicate designs both donors acceptors have significantly enhanced power conversion efficiency OPVs more than 18%. Nonfullerene small-molecule (NFAs) played critical role in enhancing short-circuit current density (JSC) by efficiently harvesting near-infrared (NIR) sunlight. To take full advantage abundant NIR photons, optical band gap NFAs should further reduced improve performance OPVs. Incorporating highly polarizable selenium atoms onto backbone conjugated materials has been proven an effective way decrease gap. For example, selenium-substituted NFA recently developed our group attained JSC approximate 27.5 mA cm-2 OPV devices, surpassing those most emerging photovoltaic systems. Inspired this advance, we concentrate on topic selenium-containing Account incite readers' interest exploring series materials.In Account, first compare differences among chalcogen heterocycles discuss influence fundamental electronic behavior collective photoelectrical properties resulting materials. superior features summarized as follows: (1) large covalent radius diminish π-orbital overlap, rendering quinoidal resonance character narrowed (2) atom is sulfur its larger looser outermost electron cloud, enabling intermolecular Se-Se interaction increased charge carrier mobility relevant solid state. We then focus summarizing design rules various categories including polymer donors, acceptors, especially composed ladder-type polycyclic units. motivation incorporating into these structure-property relationships were thoroughly elucidated. Specifically, changes gap, mobility, molecular packing induced substitution correlate effects exciton behaviors, loss, nanoscale film morphology corresponding devices. Furthermore, point out intrinsic stability under maximum-power-point tracking long-term photo- or thermostress indicate potential use semitransparent tandem solar cells. At end, prospect future research focuses possible applications field discussed.

Language: Английский

Renewed Prospects for Organic Photovoltaics DOI
Guichuan Zhang, Francis Lin, Qi Feng

et al.

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

Citations

661
Recent progress in organic solar cells (Part I material science) DOI
Yahui Liu, Bowen Liu, Chang‐Qi Ma

et al.

Science China Chemistry, Journal Year: 2021, Volume and Issue: 65(2), P. 224 - 268

Published: Dec. 27, 2021

Language: Английский

Citations

505
A Well‐Mixed Phase Formed by Two Compatible Non‐Fullerene Acceptors Enables Ternary Organic Solar Cells with Efficiency over 18.6% DOI

Yunhao Cai,

Yun Li, Rui Wang

et al.

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(33)

Published: July 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.

Language: Английский

Citations

411
Completely non-fused electron acceptor with 3D-interpenetrated crystalline structure enables efficient and stable organic solar cell DOI Creative Commons

Lijiao Ma,

Shaoqing Zhang,

Jincheng Zhu

et al.

Nature Communications, Journal Year: 2021, Volume and Issue: 12(1)

Published: Aug. 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.

Language: Английский

Citations

294
Desired open-circuit voltage increase enables efficiencies approaching 19% in symmetric-asymmetric molecule ternary organic photovoltaics DOI Creative Commons
Lingling Zhan, Shuixing Li,

Yaokai Li

et al.

Joule, Journal Year: 2022, Volume and Issue: 6(3), P. 662 - 675

Published: Feb. 25, 2022

Language: Английский

Citations

293
Suppressed recombination loss in organic photovoltaics adopting a planar–mixed heterojunction architecture DOI
Kui Jiang, Jie Zhang, Cheng Zhong

et al.

Nature Energy, Journal Year: 2022, Volume and Issue: 7(11), P. 1076 - 1086

Published: Nov. 14, 2022

Language: Английский

Citations

249
Progress and prospects of the morphology of non-fullerene acceptor based high-efficiency organic solar cells DOI
Lei Zhu, Ming Zhang, Wenkai Zhong

et al.

Energy & Environmental Science, Journal Year: 2021, Volume and Issue: 14(8), P. 4341 - 4357

Published: Jan. 1, 2021

This review summarizes the important morphological characteristics and recent research progress of non-fullerene acceptor based organic solar cells, as well provides insights perspectives on this topic.

Language: Английский

Citations

212
A New Polymer Donor Enables Binary All‐Polymer Organic Photovoltaic Cells with 18% Efficiency and Excellent Mechanical Robustness DOI

Jingwen Wang,

Yong Cui, Ye Xu

et al.

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(35)

Published: July 15, 2022

The development of polymerized small-molecule acceptors has boosted the power conversion efficiencies (PCEs) all-polymer organic photovoltaic (OPV) cells to 17%. However, polymer donors suitable for OPV are still lacking, restricting further improvement their PCEs. Herein, a new donor named PQM-Cl is designed and its performance explored. negative electrostatic potential low average local ionization energy distribution surface enable efficient charge generation transfer process. When blending with well-used acceptor, PY-IT, PQM-Cl-based devices deliver an impressive PCE 18.0% superior fill factor 80.7%, both which highest values cells. relevant measurements demonstrate that films possess excellent mechanical flexible properties. As such, fabricated 16.5% high stability displayed. These results candidate provide insights into design high-efficient

Language: Английский

Citations

211
The Path to 20% Power Conversion Efficiencies in Nonfullerene Acceptor Organic Solar Cells DOI Creative Commons
Akchheta Karki, Alexander J. Gillett, Richard H. Friend

et al.

Advanced Energy Materials, Journal Year: 2020, Volume and Issue: 11(15)

Published: Dec. 18, 2020

Abstract The power conversion efficiencies (PCEs) of single‐junction organic solar cells (OSC) have now reached over 18%. This rapid recent progress can be attributed to the development new nonfullerene electron acceptors (NFAs) that are paired with suitable high performing polymer donors. Substantial improvements in PCEs and long‐term stability enabled by NFA OSCs allowed integration these systems into many niche novel applications. Here, has been made understanding device photophysics polymer:NFA blends is highlighted. As bulk heterojunction morphology intrinsically linked photophysics, this review focuses on studies provided noteworthy morphological insights using advanced techniques such as solid‐state NMR resonant soft X‐ray scattering. Through this, some major challenges must overcome attain 20% addressed.

Language: Английский

Citations

195
Asymmetric electron acceptor enables highly luminescent organic solar cells with certified efficiency over 18% DOI Creative Commons

Chengliang He,

Zeng Chen, Tonghui Wang

et al.

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: May 11, 2022

Enhancing the luminescence property without sacrificing charge collection is one key to high-performance organic solar cells (OSCs), while limited by severe non-radiative recombination. Here, we demonstrate efficient OSCs with high via design and synthesis of an asymmetric non-fullerene acceptor, BO-5Cl. Blending BO-5Cl PM6 donor leads a record-high electroluminescence external quantum efficiency 0.1%, which results in low voltage loss 0.178 eV power conversion (PCE) over 15%. Importantly, incorporating as third component into widely-studied donor:acceptor (D:A) blend, PM6:BO-4Cl, allows device displaying certified PCE 18.2%. Our joint experimental theoretical studies unveil that more diverse D:A interfacial conformations formed acceptor induce optimized blend energetics, contributes improved performance balancing generation

Language: Английский

Citations

195