Joule, Journal Year: 2023, Volume and Issue: 7(9), P. 2135 - 2151
Published: July 24, 2023
Language: Английский
Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(5), P. 2350 - 2387
Published: Jan. 1, 2024
Organic solar cells (OSCs) have attracted a great deal of attention in the field clean energy due to their advantages transparency, flexibility, low cost and light weight. Introducing them market enables seamless integration into buildings windows, while also supporting wearable, portable electronics internet-of-things (IoT) devices. With development photovoltaic materials optimization fabrication technology, power conversion efficiencies (PCEs) OSCs rapidly improved now exceed 20%. However, there is significant lack focus on material stability device lifetime, causing severe hindrance commercial applications. In this review, we carefully review important strategies employed improve over past three years from perspectives design engineering. Furthermore, analyze discuss current progress terms air, light, thermal mechanical stability. Finally, propose future research directions overcome challenges achieving highly stable OSCs. We expect that will contribute solving problem OSCs, eventually paving way for applications near future.
Language: Английский
Citations
112
Advanced Energy Materials, Journal Year: 2022, Volume and Issue: 13(1)
Published: Dec. 9, 2022
Abstract Following the 2nd release of “Emerging PV reports,” best achievements in performance emerging photovoltaic devices diverse research subjects are summarized, as reported peer‐reviewed articles academic journals since August 2021. Updated graphs, tables, and analyses provided with several parameters, e.g., power conversion efficiency, open‐circuit voltage, short‐circuit current density, fill factor, light utilization stability test energy yield. These parameters presented a function bandgap average visible transmittance for each technology application, put into perspective using, detailed balance efficiency limit. The 3rd installment reports” extends scope toward triple junction solar cells.
Language: Английский
Citations
106
Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(26)
Published: April 26, 2023
High efficiency organic solar cells (OSCs) based on A-DA'D-A type small molecule acceptors (SMAs) were mostly fabricated by toxic halogenated solvent processing, and power conversion (PCE) of the non-halogenated processed OSCs is mainly restricted excessive aggregation SMAs. To address this issue, we developed two vinyl π-spacer linking-site isomerized giant (GMAs) with linking inner carbon (EV-i) or out (EV-o) benzene end group SMA longer alkyl side chains (ECOD) for capability solvent-processing. Interestingly, EV-i possesses a twisted molecular structure but enhanced conjugation, while EV-o shows better planar weakened conjugation. The OSC as acceptor o-xylene (o-XY) demonstrated higher PCE 18.27 % than that devices ECOD (16.40 %) (2.50 %). one highest PCEs among from solvents so far, benefitted suitable structure, stronger absorbance high charge carrier mobility EV-i. results indicate GMAs site would be excellent candidates fabricating performance solvents.
Language: Английский
Citations
87
Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(21)
Published: March 22, 2023
Abstract Organic solar cells (OSCs) have advanced rapidly due to the development of new photovoltaic materials. However, long‐term stability OSCs still poses a severe challenge for their commercial deployment. To address this issue, dimer acceptor ( d T9TBO) with flexible linker is developed incorporation into small‐molecule acceptors form molecular alloy enhanced intermolecular packing and suppressed diffusion stabilize active layer morphology. Consequently, PM6 : Y6 T9TBO‐based device displays an improved power conversion efficiency (PCE) 18.41 % excellent thermal negligible decay after being aged at 65 °C 1800 h. Moreover, OSC also exhibits mechanical durability, maintaining 95 its initial PCE bended repetitively 1500 cycles. This work provides simple effective way fine‐tune stabilized morphology overcome trade‐off between stability.
Language: Английский
Citations
84
Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(30)
Published: May 26, 2023
Abstract The central core in A‐DA 1 D‐A‐type small‐molecule acceptor (SMAs) plays an important role determining the efficiency of organic solar cells (OSCs), while principles governing efficient design SMAs remain elusive. Herein, we developed a series with pyrido[2,3‐ b ]quinoxaline (PyQx) as new electron‐deficient unit by combining cascade‐chlorination strategy, namely Py1, Py2, Py3, Py4 and Py5. introduction chlorine atoms reduces intramolecular charge transfer effects but elevates LUMO values. Density functional theory (DFT) reveals that Py2 ortho substituted PyQx Py5 two yield larger dipole moments smaller π⋅⋅⋅π stacking distances, compared other three acceptors. Moreover, shows strongest light absorption capability induced extended orbit overlap lengths more packing structures dimers. These features endow best device performance due to better molecular aggregation behaviors, suitable domain sizes exciton dissociation recombination. This study highlights significance incorporating large moments, small distances dimers into development high‐performance SMAs, providing insight for OSCs.
Language: Английский
Citations
82
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(22)
Published: March 25, 2024
The development of high-efficiency organic solar cells (OSCs) processed from non-halogenated solvents is crucially important for their scale-up industry production. However, owing to the difficulty regulating molecular aggregation, there a huge efficiency gap between and halogenated solvent OSCs. Herein, we fabricate o-xylene OSCs with approaching 20 % by incorporating trimeric guest acceptor named Tri-V into PM6:L8-BO-X host blend. incorporation effectively restricts excessive aggregation L8-BO-X, regulates packing optimizes phase-separation morphology, which leads mitigated trap density states, reduced energy loss suppressed charge recombination. Consequently, PM6:L8-BO-X:Tri-V-based device achieves an 19.82 %, representing highest solvent-processed reported date. Noticeably, addition Tri-V, ternary shows improved photostability than binary PM6:L8-BO-X-based device, maintains 80 initial after continuous illumination 1380 h. This work provides feasible approach fabricating high-efficiency, stable, eco-friendly OSCs, sheds new light on large-scale industrial production
Language: Английский
Citations
73
Advanced Materials, Journal Year: 2023, Volume and Issue: 35(44)
Published: Aug. 22, 2023
High power conversion efficiency (PCE) and mechanical robustness are key requirements for wearable applications of organic solar cells (OSCs). However, almost all highly efficient photoactive films comprising polymer donors (PD ) small molecule acceptors (SMAs) mechanically brittle. In this study, (PCE = 17.91%) robust (crack-onset strain [COS] 11.7%) flexible OSCs fabricated by incorporating a ductile oligomeric acceptor (DOA) into the PD :SMA system, representing most to date. The photophysical, mechanical, photovoltaic properties D18:N3 with different DOAs characterized. By introducing DOA DOY-C4 longer alkyl linker lower polymerization, D18:N3:DOY-C4-based exhibit significantly higher PCE (17.91%) 50% COS (11.7%) than D18:N3-based device 17.06%, 7.8%). based on D18:N3:DOY-C4 retain 98% initial after 2000 consecutive bending cycles, showing greater stability reference (maintaining 89% PCE). After careful investigation, it is hypothesized that enhancement in mainly due formation tie chains or entanglement ternary blend films. These results demonstrate have great potential achieving high-performance OSCs.
Language: Английский
Citations
68
Advanced Materials, Journal Year: 2023, Volume and Issue: 35(32)
Published: May 11, 2023
Abstract Sequentially deposited organic solar cells (SD‐OSCs) have attracted great attention owing to their ability in achieving a more favorable, vertically phase‐separated morphology avoid the accumulation of counter charges at absorber/transporting layer interfaces. However, processing SD‐OSCs is still quite challenging preventing penetration small‐molecule acceptors into polymer donor via erosion or swelling. Herein, solid additives (SAs) with varied electrostatic potential distributions and steric hinderance are introduced investigate effect evaporation dynamics selective interaction on vertical component distribution. Multiple modelings indicate that π – dominates interactions between aromatic SAs active components. Among them, p ‐dibromobenzene shows stronger while 2‐chloronaphthalene (2‐CN) interacts preferably acceptor. Combining depth‐dependent morphological study aided by multiple X‐ray scattering methods, it concluded can drive stronger‐interaction upward surface, having minor impact overall molecular packing. Ultimately, 2‐CN‐treated devices reduced acceptor concentration bottom surface deliver high power conversion efficiency 19.2%, demonstrating effectiveness applying improve OSCs using proper structure.
Language: Английский
Citations
65
Advanced Materials, Journal Year: 2023, Volume and Issue: 35(48)
Published: July 29, 2023
Power conversion efficiency (PCE) of organic solar cells (OSCs) processed by nonhalogenated solvents is unsatisfactory due to the unfavorable morphology. Herein, two new small molecule acceptors (SMAs) Y6-Ph and L8-Ph are synthesized introducing a phenyl end group in inner side chains SMAs Y6 L8-BO, respectively, for overcoming excessive aggregation long-time film forming solvents. First, effect time on property photovoltaic performance Y6, Y6-Ph, studied using commonly used solvents: chloroform (CF) (rapid process) chlorobenzene (CB) (slow process). It found that Y6- L8-BO-based OSCs exhibit dramatic drop PCE from CF- CB-processed devices owing large phase separation, while based show obviously increased PCEs Furthermore, L8-Ph-based solvent o-xylene (o-XY) achieved high 18.40% with an FF 80.11%. The results indicate effective strategy modulate morphology improve
Language: Английский
Citations
46
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(15)
Published: Feb. 8, 2024
Fluorine side chain functionalization of non-fullerene acceptors (NFAs) represents an effective strategy for enhancing the performance organic solar cells (OSCs). However, a knowledge gap persists regarding relationship between structural changes induced by fluorine and resultant impact on device performance. In this work, varying amounts atoms were introduced into outer chains Y-series NFAs to construct two named BTP-F0 BTP-F5. Theoretical experimental investigations reveal that side-chain fluorination significantly increase overall average electrostatic potential (ESP) charge balance factor, thereby effectively improving ESP-induced intermolecular interaction, thus precisely tuning molecular packing bulk-heterojunction morphology. Therefore, BTP-F5-based OSC exhibited enhanced crystallinity, domain purity, reduced spacing, optimized phase distribution in vertical direction. This facilitates exciton diffusion, suppresses recombination, improves extraction. Consequently, promising power conversion efficiency (PCE) 17.3 % 19.2 achieved binary ternary devices, respectively, surpassing PCE 16.1 BTP-F0-based OSCs. work establishes structure-performance demonstrates is compelling achieving ideal separation highly efficient
Language: Английский
Citations
46