Synergistic dual-interface modification strategy for highly reproducible and efficient PTAA-based inverted perovskite solar cells

Dai, Junqian; Xiong, Jian; Liu, Naihe; He, Zhen; Zhang, Yongsong; Zhan, Shiping; Fan, Baojin; Liu, Weizhi; Huang, Xiaoying; Hu, Xiaotian; Wang, Dongjie; Huang, Yu; Zhang, Zheling; Zhang, Jian

doi:10.1016/j.cej.2022.139988

Cited by 26 publications

(25 citation statements)

References 92 publications

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“…It is worth noticing that the performance is enhanced when the PTAA is modified by the polyvinyl oxide (PEO), which is attributed to the improvement of the interface contact and defects passivation according to our previous works. [ 71 ] The devices with the structure of ITO/PTAA/PEO/MAPbI 3 /PCBM/BCP/Ag is named as “PEO‐BCP” devices and the devices with the structure of ITO/PTAA/PEO/MAPbI 3 /PCBM/OXD‐7/Ag is named as “PEO‐OXD‐7” devices, of which the structure of the devices are shown in Figure S19, Supporting Information. The PEO‐OXD‐7 devices show an average PCE of 21.67%, with V oc of 1.10 V, J sc of 23.66 mA cm −2 and FF of 83.5%, which is superior to that of PEO‐BCP devices (Figure 6g, and Table S8, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Multifunctional Anti‐Corrosive Interface Modification for Inverted Perovskite Solar Cells

Liu

Xiong

et al. 2023

Advanced Energy Materials

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(2 of 15)through grain boundaries (GBs) and penetrate the charge transport layer and thus corrode the metal electrode. [12] Especially, halide ion migration-induced electrode corrosion in inverted PSCs is more serious because the aggregation and poor filmforming performance of the PCBM lead to the lack of barrier effect of the thin films on ion migration. [13] Furthermore, the metal typically evaporated at high temperatures, which may damage the organic fullerene and thus form interfacial defects. [14] The above issues could result in adverse exciton dissociation at the cathode interface. [15] Thus, overcoming the interface issues and simultaneously improving the performance and stability is urgently necessary for the development of inverted PSCs. Interface modification strategies are a promising way to overcome interface issues. Many materials have been introduced to inverted PSCs to enhance the interface energy matching, anti-corrosion as well as surface hydrophobicity, such as metal oxide (Al 2 O 3 , [16] TiO 2 , [17] ZnO [18] ) bismuth layer, [19] organometallic carbon long derivative, [20] some organic materials (polyethylenimine ethoxylated [PEIE], [21] poly[(9,9-bis(3′-(N,N-dimethylamino)propyl)-2,7-fluorene)-alt2,7-(9,9-dioctylfluorene)], [22] Bathocuproine [BCP], [3b] Rhodamine [23] ) [24] and some salts (LiF [25] ). Looking at the existing interface materials in inverted PSCs, there are still challenges in using the same material to achieve multiple interface functions to enhance the performance and stability of the devices, such as the improvement of corrosion resistance of the electrode has a negative impact on the efficient charge transfer of the cathode interface, [11,26] so it is necessary to balance the anti-corrosion performance and the performance of the device. In addition, the disadvantage of harsh preparation conditions and hygroscopic properties of them will increase the cost of the preparation and threaten the device stability.Up to now, the most promising way to overcome the above problem based on an inverted device structure is using evaporated BCP inserting between perovskite/fullerene heterojunction and metal cathodes. [27] That strategy pushes the performance of inverted devices to a high of 25%, which is comparable with that of regular n-i-p devices. [27] The excellent performance of the evaporated BCP cathode interface is ascribed to the high quality of the evaporated film and the suitable electrical property of BCP. [28] The extremely dense and uniform film can form high-quality interface contact and could act as a physical barrier layer to prevent the ions migration, which enhances the performance and stability of the devices. [28] Although the performance of the inverted PSCs has been dramatically enhanced by evaporated BCP electron transport layer, the cathode interface layer prepared by the solution method is desired by the industry at the time of promoting the industrialization of PSCs. [29] Unfortunately, the solution-processed BCP shows poor film formation because of its eas...

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Section: Resultsmentioning

confidence: 99%

Multifunctional Anti‐Corrosive Interface Modification for Inverted Perovskite Solar Cells

Liu

Xiong

et al. 2023

Advanced Energy Materials

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“…This is advantageous for passivating interfacial defects and decreasing interfacial energy loss. 37 The aforementioned reasons should provide some benefits in the enhancements of V OC and FF. 38,39 The X-ray photoelectron spectroscopy (XPS) method was used to study the effect of C 10 H 14 O 5 Ti on the perovskite filmforming quality.…”

Section: Morphology Analysismentioning

confidence: 99%

“…3a), where PTAA was used as a HTL, the ternary cationic CsFAMA with a bandgap of 1.6 eV was performed as the active layer. 37,43 The high-performance polymer PM6 as the donor material and two acceptor materials (L8-BO 44−46 and PC 61 BM 47 ) were used to prepare the organic BHJ layer and the molecular structures are shown in Figure S2a−c. The effect of different weight ratios of PC 61 BM, PM6 and L8-BO on the photovoltaic performance was detailly explored.…”

Section: Morphology Analysismentioning

confidence: 99%

Reducing Interfacial Losses in Solution-Processed Integrated Perovskite-Organic Solar Cells

Weng,

Liao,

et al. 2024

ACS Appl. Mater. Interfaces

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Low bandgap organic semiconductors have been widely employed to broaden the light response range to utilize much more photons in the inverted perovskite solar cells (PSCs). However, the serious charge recombination at the heterointerface contact between perovskite and organic semiconductors usually leads to large energy loss and limits the device performance. In this work, a titanium chelate, bis(2,4-pentanedionato) titanium(IV) oxide (C 10 H 14 O 5 Ti), was directly used as an interlayer between the perovskite layer and organic bulk heterojunction layer for the first time. Impressively, it was found that C 10 H 14 O 5 Ti can not only increase the surface potential of perovskite films but also show a positive passivation effect toward the perovskite film surface. Drawing from the above function, a smoother perovskite active layer with a higher work function was realized upon the use of C 10 H 14 O 5 Ti. As a result, the C 10 H 14 O 5 Ti-modified integrated devices show lower interfacial loss and obtain the best power conversion efficiency (PCE) of up to 20.91% with a high voltage of 1.15 V. The research offers a promising strategy to minimize the interfacial loss for the preparation of high-performance perovskite solar cells.

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“…Sustainable development of high-quality energy is vital for economic and social development, powering a better life and building a cleaner and more beautiful world. − As we transition toward a new energy mix with an increasingly higher proportion of green renewable energy in the global electricity system, large-scale battery storage systems will play a very important role. − At present, while battery technology is dominated by lithium-ion batteries in applications that include consumer electronics and electric vehicles, aluminum batteries (ABs) have attracted interest due to their potential low cost, intrinsic safety, abundant supply, and lower sensitivity to moisture and oxygen in the air. − Many conventional cathode designs require the use of transition metals. − Some of the key issues associated with the use of transition metals are the high production costs, scarcity of raw materials, and difficult recycling. Compared with metal cathode materials, organic cathode materials have structural diversity, designability, environmental friendliness, and sustainability. − Among organic materials, carbonyl compounds have been extensively studied and suggested as candidate cathodes for aluminum batteries because of their well-known redox reaction mechanism. , Despite significant research progress over the years, current carbonyl-containing electrode materials still have some limitations, and commercial applications still face considerable challenges.…”

Section: Introductionmentioning

confidence: 99%

Rational Molecular Design Strategy of a Carbonyl Cathode for Better Aluminum Organic Batteries

Luo

Liu

Zhang

et al. 2023

ACS Sustainable Chem. Eng.

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Aluminum batteries with aluminum as the anode and organic materials as the cathode have continuously drawn considerable attention because of their high theoretical energy density, natural abundance, and environmentally benign nature. Herein, we have done an elaborate design work on the basis of π–π conjugated organic molecule PTCDA by a molecular engineering strategy. Introducing a sulfur atom to replace the H atom in the aromatic ring of the PTCDA molecule to form SPTCDA (sulfurized PTCDA) with p−π conjugated system can reduce the energy level of the molecule. In addition, the extension of the conjugated system makes the electrons more delocalized, which is beneficial to the improvement of the conductivity of SPTCDA. Experimental results show that compared with pristine PTCDA, SPTCDA has a more stable structure and better cycle performance, rate capability, and coulombic efficiency, as well as a higher discharge voltage plateau. To further understand the electronic structure, operating voltage, and correct redox mechanism, density functional theory (DFT) calculations were performed for PTCDA and SPTCDA. The diffusion behavior of ions on the electrode surface was also discussed. This work reveals an important molecular structure design strategy for a carbonyl cathode, in order to break the application limitations of this electrode material on aluminum organic batteries.

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Synergistic dual-interface modification strategy for highly reproducible and efficient PTAA-based inverted perovskite solar cells

Cited by 26 publications

References 92 publications

Multifunctional Anti‐Corrosive Interface Modification for Inverted Perovskite Solar Cells

Multifunctional Anti‐Corrosive Interface Modification for Inverted Perovskite Solar Cells

Reducing Interfacial Losses in Solution-Processed Integrated Perovskite-Organic Solar Cells

Rational Molecular Design Strategy of a Carbonyl Cathode for Better Aluminum Organic Batteries

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