Charge transfer rates and electron trapping at buried interfaces of perovskite solar cells

Joule, Год журнала: 2021, Номер 5(11), С. 2915 - 2933

Опубликована: Авг. 18, 2021

Identification of electronic processes at buried interfaces charge-selective contacts is crucial for photovoltaic and photocatalysis research. Here, transient surface photovoltage (SPV) used to study the passivation different hole-selective carbazole-based SAMs. It shown that SPV photoluminescence provide complementary information on charge transfer kinetics trapping/de-trapping mechanisms, trap-assisted non-radiative recombination losses originate from electron trapping SAM-modified ITO/perovskite interface. The hole rates density interface traps, obtained by fitting transients with a minimalistic kinetic model, depended strongly SAM's chemical structure, densities traps as low 109 cm−2, par highly passivated c-Si surfaces, were reached Me-4PACz, previously in record perovskite/silicon tandem solar cells. extracted rate constants trap correlated well corresponding fill factors open-circuit voltages high-efficiency

Язык: Английский

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Self-Assembled Monolayers for Interfacial Engineering in Solution-Processed Thin-Film Electronic Devices: Design, Fabrication, and Applications

Chemical Reviews, Год журнала: 2024, Номер 124(5), С. 2138 - 2204

Опубликована: Фев. 29, 2024

Interfacial engineering has long been a vital means of improving thin-film device performance, especially for organic electronics, perovskites, and hybrid devices. It greatly facilitates the fabrication performance solution-processed devices, including field effect transistors (OFETs), solar cells (OSCs), perovskite (PVSCs), light-emitting diodes (OLEDs). However, due to limitation traditional interfacial materials, further progress these devices is hampered particularly in terms stability, flexibility, sensitivity. The deadlock gradually broken through development self-assembled monolayers (SAMs), which possess distinct benefits transparency, diversity, sensitivity, selectivity, surface passivation ability. In this review, we first showed evolution SAMs, elucidating their working mechanisms structure–property relationships by assessing wide range SAM materials reported date. A comprehensive comparison various growth, fabrication, characterization methods was presented help readers interested applying works. Moreover, recent design applications mainstream electronic OFETs, OSCs, PVSCs OLEDs, summarized. Finally, an outlook prospects section summarizes major challenges SAMs used

Язык: Английский

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Co‐assembled Monolayers as Hole‐Selective Contact for High‐Performance Inverted Perovskite Solar Cells with Optimized Recombination Loss and Long‐Term Stability

Angewandte Chemie International Edition, Год журнала: 2022, Номер 61(30)

Опубликована: Май 13, 2022

Self-assembled monolayers (SAMs) have been widely employed as an effective way to modify interfaces of electronic/optoelectronic devices. To achieve a good control the growth and molecular functionality SAMs, we develop co-assembled monolayer (co-SAM) for obtaining efficient hole selection suppressed recombination at hole-selective interface in inverted perovskite solar cells (PSCs). By engineering position methoxy substituents, aligned energy level favorable dipole moment can be obtained our newly synthesized SAM, ((2,7-dimethoxy-9H-carbazol-9-yl) methyl) phosphonic acid (DC-PA). An alkyl ammonium containing SAM is further optimize surface functionalization interaction with layer on top. A champion device excellent power conversion efficiency (PCE) 23.59 % improved stability are achieved. This work demonstrates advantage using co-SAM improving performance PSCs.

Язык: Английский

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Interface Engineering for Highly Efficient Organic Solar Cells

Advanced Materials, Год журнала: 2023, Номер 36(16)

Опубликована: Март 3, 2023

Organic solar cells (OSCs) have made dramatic advancements during the past decades owing to innovative material design and device structure optimization, with power conversion efficiencies surpassing 19% 20% for single-junction tandem devices, respectively. Interface engineering, by modifying interface properties between different layers OSCs, has become a vital part promote efficiency. It is essential elucidate intrinsic working mechanism of layers, as well related physical chemical processes that manipulate performance long-term stability. In this article, advances in engineering aimed pursue high-performance OSCs are reviewed. The specific functions corresponding principles summarized first. Then, anode layer, cathode layer interconnecting devices discussed separate categories, engineering-related improvements on efficiency stability analyzed. Finally, challenges prospects associated application emphasis large-area, high-performance, low-cost manufacturing.

Язык: Английский

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Novel Phenothiazine‐Based Self‐Assembled Monolayer as a Hole Selective Contact for Highly Efficient and Stable p‐i‐n Perovskite Solar Cells

Advanced Energy Materials, Год журнала: 2021, Номер 12(2)

Опубликована: Ноя. 25, 2021

Abstract Recent advances in perovskite solar cells (PSCs) performance have been closely related to improved interfacial engineering and charge selective contacts. Here, a novel cost‐competitive phenothiazine based, self‐assembled monolayer (SAM) as hole‐selective contact for p‐i‐n PSCs is introduced. The molecularly tailored SAM enables an energetically well‐aligned interface with the absorber, minimized nonradiative recombination loss, thus dramatically improving extraction/transport device performance. resulting exhibit power conversion efficiency (PCE) of up 22.44% (certified 21.81%) average fill factor close 81%, which among highest efficiencies reported date PSCs. new also demonstrates outstanding operational stability PSC, increasing PCE from 20.3% 21.8% during continuous maximum point tracking under simulated 1 sun illumination 100 h. findings highlight great potential engineered SAMs fabrication stable high performing

Язык: Английский

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Stability of organic solar cells: toward commercial applications

Chemical Society Reviews, Год журнала: 2024, Номер 53(5), С. 2350 - 2387

Опубликована: Янв. 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.

Язык: Английский

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Over 18% ternary polymer solar cells enabled by a terpolymer as the third component

Nano Energy, Год журнала: 2021, Номер 92, С. 106681 - 106681

Опубликована: Ноя. 5, 2021

"Ternary blending" and "random terpolymerization" strategies have both proven effective for enhancing the performance of organic solar cells (OSCs). However, reports on combination two remain rare. Here, a terpolymer PM6-Si30 was constructed by inserting chlorine alkylsilyl-substituted benzodithiophene (BDT) unit (0.3 equivalent) into state-of-the-art polymer PM6. The exhibitsadeep highest-occupied-molecular-orbital energy good miscibility with PM6 BTP-eC9 (C9) enables its use as third component PM6:PM6-Si30:C9 bulk-heterojunction OSCs. resulting exhibit maximum power conversion efficiency (PCE) 18.27%, which is higher than that obtained optimized control binary PM6:C9-based OSC (17.38%). enhanced attributed to improved charge transport, favorable molecular arrangement, reduced loss suppressed bimolecular recombination. work demonstrates potential random in OSCs highlights new strategy construction ternary system photovoltaic performance.

Язык: Английский

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18.9% Efficient Organic Solar Cells Based on n‐Doped Bulk‐Heterojunction and Halogen‐Substituted Self‐Assembled Monolayers as Hole Extracting Interlayers

Advanced Energy Materials, Год журнала: 2022, Номер 12(45)

Опубликована: Окт. 3, 2022

Abstract The influence of halogen substitutions (F, Cl, Br, and I) on the energy levels self‐assembled hole‐extracting molecule [2‐(9 H ‐Carbazol‐9‐yl)ethyl]phosphonic acid (2PACz), is investigated. It found that formation monolayers (SAMs) [2‐(3,6‐Difluoro‐9 ‐carbazol‐9‐yl)ethyl]phosphonic (F‐2PACz), [2‐(3,6‐Dichloro‐9 (Cl‐2PACz), [2‐(3,6‐Dibromo‐9 (Br‐2PACz), [2‐(3,6‐Diiodo‐9 (I‐2PACz) directly indium tin oxide (ITO) increases its work function from 4.73 eV to 5.68, 5.77, 5.82, 5.73 eV, respectively. Combining these ITO/SAM electrodes with ternary bulk‐heterojunction (BHJ) system PM6:PM7‐Si:BTP‐eC9 yields organic photovoltaic (OPV) cells power conversion efficiency (PCE) in range 17.7%–18.5%. OPVs featuring Cl‐2PACz SAMs yield highest PCE 18.5%, compared F‐2PACz (17.7%), Br‐2PACz (18.0%), or I‐2PACz (18.2%). Data analysis reveals enhanced performance Cl‐2PACz‐based relates increased hole mobility, decreased interface resistance, reduced carrier recombination, longer lifetime. Furthermore, show stability under continuous illumination ITO/PEDOT:PSS‐based cells. Remarkably, introduction n‐dopant benzyl viologen into BHJ further boosted ITO/Cl‐2PACz a maximum value 18.9%, record‐breaking for SAM‐based par best‐performing reported date.

Язык: Английский

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Hole-Transporting Self-Assembled Monolayer Enables Efficient Single-Crystal Perovskite Solar Cells with Enhanced Stability

ACS Energy Letters, Год журнала: 2023, Номер 8(2), С. 950 - 956

Опубликована: Янв. 13, 2023

The difficulty of growing perovskite single crystals in configurations suitable for efficient photovoltaic devices has hampered their exploration as solar cell materials, despite potential to advance technology beyond polycrystalline films through markedly lower defect densities and desirable optoelectronic properties. While film absorbers can be deposited on myriad substrates, fit high-efficiency have only been demonstrated hydrophobic hole-transport layers [HTLs, e.g., poly(triaryl amine) (PTAA)], which severely restricted the avenues enhancing device efficiency stability. Herein, we report growth mixed-cation FA0.6MA0.4PbI3 a hydrophilic self-assembled monolayer {SAM, [2-(3,6-dimethoxy-9H-carbazol-9-yl)ethyl]phosphonic acid), (MeO-2PACz)} HTL surface. Compared with PTAA, MeO-2PACz SAM promotes mechanical adhesion substrate, enabling fabrication inverted cells substantially enhanced operational stability power conversion efficiencies up 23.1%, setting new benchmark single-crystal cells.

Язык: Английский

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Recent Developments of Polymer Solar Cells with Photovoltaic Performance over 17%

Advanced Functional Materials, Год журнала: 2023, Номер 33(14)

Опубликована: Янв. 22, 2023

Abstract With the emergence of ADA'DA‐type (Y‐series) non‐fullerene acceptors (NFAs), power conversion efficiencies (PCEs) organic photovoltaic devices have been constantly refreshed and gradually reached 20% in recent years (19% for single junction tandem device). The possess specific design concept, which greatly enrich NFA types excellent compatibility with many donor materials. It is gratifying to note that previously underperforming materials combine these regulated shine again. Nowadays, concept modular widely used research donors, injecting new vitality into field photovoltaics. Furthermore, also promote multicomponent devices, bilayer processing solvent engineering, additive engineering. Herein, latest progresses polymer solar cells efficiency over 17% are briefly reviewed from aspects active material design, interface development, device technology. At last, opportunities challenges commercialization future discussed.

Язык: Английский

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