Charge-transfer induced multifunctional BCP:Ag complexes for semi-transparent perovskite solar cells with a record fill factor of 80.1%

Ying, Zhiqin; Yang, Xi; Zheng, Jianping; Zhu, Yudong; Jiang, Xiaofeng; Chen, Wei; Shou, Chunhui; Sheng, Jiang; Zeng, Yuheng; Yan, Baojie; Pan, Hui; Ye, Jichun; He, Zhubing

doi:10.1039/d1ta01180d

Cited by 35 publications

(29 citation statements)

References 39 publications

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“…Figure 6e shows that there is a large increase in the N 1s binding energy upon Cu deposition, which is indicative of a strong interaction between Cu and the N atoms in the bay area of the phenanthroline ring, similar to that reported to occur between evaporated Ag and BCP. [49] Small angle X-ray scattering measurements (Figure 6f) show that the mean crystallite radius for Cu deposited on BCP is 7.9 ± 0.2 nm which is ≈40% smaller than that of Ag, 13.3 ± 0.2 nm, consistent with a higher density of nucleation sites for Cu than Ag and/or a lower mobility of Cu atoms over the BCP surface during film growth. Both possibilities are consistent with a stronger interaction between Cu and BCP than between Ag and BCP.…”

Section: Resultsmentioning

confidence: 76%

Enhanced Stability of Tin Halide Perovskite Photovoltaics Using a Bathocuproine—Copper Top Electrode

Wijesekara

Walker

Han

et al. 2021

Advanced Energy Materials

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with a useful lifetime of decades. Tin perovskites also offer narrower bandgaps than their lead analogues, enabling a greater proportion of the solar spectrum to be harvested. [4] The Achilles' heel of tin perovskites for PV applications is their higher susceptibility to oxidation in air which stems from the tendency of Sn 2+ to convert to the more thermodynamically stable +4 oxidation state upon exposure to ambient air. [5] The intrinsic resistance of the device stack to air ingress dictates the degree of packaging required for practical applications, and thus the packaging cost, so there is a need to identify ways to make tin perovskite PVs more intrinsically stable. [1,2] Strategies to achieving this goal include making the perovskite more stable by compositional engineering or defect passivation [6] and/or making the other

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Section: Resultsmentioning

confidence: 76%

Enhanced Stability of Tin Halide Perovskite Photovoltaics Using a Bathocuproine—Copper Top Electrode

Wijesekara

Walker

Han

et al. 2021

Advanced Energy Materials

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“…Since the LUMO levels of the prevailing electron transport materials in organic solar cells (OSCs) mostly range from −4 to −3 eV 9 , the CAN-modified electrodes with a low work function of approximately 3.0 eV can also facilitate electron extraction in view of energy alignment. In addition, a 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP):Ag complex has been successfully employed to reduce the electron extraction barrier between a C 60 electron transport layer and indium-zinc oxide top electrode in high-performance perovskite solar cells 36 . Thus, the CAN technique possessing high WF tunability, good thermal stability, and a wide processing window is anticipated to be applicable to cathode modification in OLEDs, OSCs, and other optoelectronic devices.…”

Section: Resultsmentioning

confidence: 99%

In situ-formed tetrahedrally coordinated double-helical metal complexes for improved coordination-activated n-doping

Liu

et al. 2022

Nat Commun

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In situ coordination-activated n-doping by air-stable metals in electron-transport organic ligands has proven to be a viable method to achieve Ohmic electron injection for organic optoelectronics. However, the mutual exclusion of ligands with high nucleophilic quality and strong electron affinity limits the injection efficiency. Here, we propose meta-linkage diphenanthroline-type ligands, which not only possess high electron affinity and good electron transport ability but also favour the formation of tetrahedrally coordinated double-helical metal complexes to decrease the ionization energy of air-stable metals. An electron injection layer (EIL) compatible with various cathodes and electron transport materials is developed with silver as an n-dopant, and the injection efficiency outperforms conventional EILs such as lithium compounds. A deep-blue organic light-emitting diode with an optimized EIL achieves a high current efficiency calibrated by the y colour coordinate (0.045) of 237 cd A−1 and a superb LT95 of 104.1 h at 5000 cd m−2.

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“…Moreover, because of the thermal instability of the perovskite layer, the annealing process for the TCO rear electrode that deposited on the perovskite absorber layer is generally omitted, leading to inferior optical transparency than high-temperatureprocessed TCOs. To mitigate the parasitic light-absorption issues, TCOs with relatively high electron mobility and a low carrier density, such as hydrogen-doped indium oxide, [80,133] indium-doped zinc oxide, [133,134] and combined TCOs, [135] are employed as the rear electrode. Alternatively, some ultrathin metal/dielectric film stacks, [136][137][138] metallic nanostructures (e.g., Ag nanowires), [139,140] carbon nanostructures (e.g., graphene, nanotubes) [141][142][143] a have also been explored for metal-oxide-free transparent electrodes.…”

Section: Optical Lossesmentioning

confidence: 99%

Perovskite Solar Cells Go Bifacial—Mutual Benefits for Efficiency and Durability

2021

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PV technologies need to advance further in terms of a substantial increase in PV module power generation, reduction in module prices, and improvement in long-term reliability, eventually realizing low levelized costs of electricity (LCOE) that are compatible with standard electricity prices in the energy market. The PV industry's future development necessitates increased attention to emerging techniques with the potential to achieve high power generation at low costs.Increasing the power output per unit area of solar panels at low additional manufacturing costs is crucial for further lowering the PV-generated electricity price. One of the simplest and inexpensive strategies for increasing the power output density of a solar panel is to harvest reflected and diffuse sunlight from the ground by employing bifacial designs. The concept of bifacial solar cells can date back to the 1960s, but the momentum to bring bifacial solar panels to the market has been gradually realized in the last decade as one of the latest technological advances in PV manufacturing. [4] The mainstream crystalline silicon (c-Si) PV module manufacturers are now producing bifacial silicon solar modules based on different cell technologies. The trend shows that bifacial solar cells and modules are increasingly important in today's PV market and may soon become the cost-effective PV standard. [5] Unlike c-Si solar cells, efficient bifacial designs have not been demonstrated in commercial inorganic thin-film PV technologies because the polycrystalline inorganic thin films suffer from short carrier lifetimes and high rear surface recombination, limiting their bifacial PV performance. Metal halide perovskite solar cells (PSCs) have generated great interest in the PV research and industry, owing to their fast-growing power conversion efficiencies (PCEs), [6] outstanding optoelectronic properties, [7] ease of production, [8] low estimated manufacturing costs, [9] and readiness to take steps toward commercialization. [10] Within a decade, PSCs have rapidly evolved from a newcomer to a leading competitor to rival other established PV technologies.The development of PSCs opens up a golden opportunity to realize efficient bifacial thin-film solar cells. Figure 1 depicts the bifacial architecture for PSCs, summarizes the unique optoelectronic properties of perovskites that enable high bifacial performance, and highlights the advantages of bifacial Bifacial solar cells hold the potential to achieve a higher power output per unit area than conventional monofacial devices without significantly increasing manufacturing costs. However, efficient bifacial designs are challenging to implement in inorganic thin-film solar cells because of their short carrier lifetimes and high rear surface recombination. The emergence of perovskite photovoltaic (PV) technology creates a golden opportunity to realize efficient bifacial thin-film solar cells, owing to their outstanding optoelectronic properties and unique features of device physics. More importantly, transparent cond...

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Charge-transfer induced multifunctional BCP:Ag complexes for semi-transparent perovskite solar cells with a record fill factor of 80.1%

Abstract: For semi-transparent perovskite solar cells (PSCs), the bombardment during the deposition of transparent conductive oxide can inevitably damage the underlying soft materials, thereby inducing a high density of defects and...

Cited by 35 publications

References 39 publications

Enhanced Stability of Tin Halide Perovskite Photovoltaics Using a Bathocuproine—Copper Top Electrode

Enhanced Stability of Tin Halide Perovskite Photovoltaics Using a Bathocuproine—Copper Top Electrode

In situ-formed tetrahedrally coordinated double-helical metal complexes for improved coordination-activated n-doping

Perovskite Solar Cells Go Bifacial—Mutual Benefits for Efficiency and Durability

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