Dual-Resistance of Ion Migration and Moisture Erosion via Hydrolytic Crosslinking of Siloxane Functionalized Poly(Ionic Liquids) for Efficient and Stable Perovskite Solar Cells

Gong, Lingyun; Yang, Jia; Sheng, Wangping; Zhong, Yang; Su, Yang; Tan, Licheng; Chen, Yiwang

doi:10.31635/ccschem.022.202201871

Cited by 36 publications

(29 citation statements)

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“…[ 7,36–38 ] X‐ray photoelectron spectroscopy (XPS) measurements of perovskite films with and without DBPF‐OH bulk passivation are performed, as exhibited in Figure 2d,e. After passivation, the shifts of Pb 4f and Br 3d peaks toward lower binding energy are observed, which can be attributed to changes in electron cloud density, suggesting an interaction between passivator and perovskite, [ 16,39,40 ] simultaneously proving that perovskite films can be electrostatically passivated by DBPF‐OH. At the same time, the strong hydrogen bonds of OH…OP in DBPF‐OH molecules will also be reduced due to the utilization of PO, and a weak hydroxyl vibration peak appears at ≈3300 cm −1 in FTIR spectra (Figure S5, Supporting Information), which means that more hydrogen bonds of OH…Br will be formed.…”

Section: Resultsmentioning

confidence: 99%

Comprehensive Passivation for High‐Performance Quasi‐2D Perovskite LEDs

Zhang

et al. 2022

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Quasi‐2D perovskites have demonstrated great application potential in light‐emitting diodes (LEDs). Defect passivation with chemicals plays a critical role to achieve high efficiency. However, there are still challenges in comprehensively passivating the defects distributed at surface, bulk, and buried interface of quasi‐2D perovskite emitting films, hindering the further improvement of device performance. Herein, 9,9‐substituted fluorene derivatives with different terminal functional groups are developed tactfully to realize comprehensive passivation, which greatly contributes to reducing nonradiative recombination at surface, suppressing ion migration in bulk, and filling interfacial charge traps at buried interface, respectively. Eventually, quasi‐2D perovskite LEDs have an increased external quantum efficiency from 18.2% to 23.2%, improved operation lifetime by more than six times and lower turn‐on voltage simultaneously. Here the importance of comprehensive passivation is highlighted and guidelines for the design and application of passivators for perovskite optoelectronics are provided.

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Section: Resultsmentioning

confidence: 99%

Comprehensive Passivation for High‐Performance Quasi‐2D Perovskite LEDs

Zhang

et al. 2022

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“…The reason for the decrease in binding energy is mainly attributed to the Pb 2+ and CQO of SA forming the coordination bond, resulting in a higher electron density. 41,42 Moreover, nanoimprint technology is a physical process and does not affect the chemical environment around the Pb atom, resulting in the same binding energy for the PVK-SA and imprinted PVK-SA samples. The XPS spectra of the N 1s (Fig.…”

Section: Papermentioning

confidence: 99%

Omnidirectional diffusion of organic amine salts assisted by ordered arrays in porous lead iodide for two-step deposited large-area perovskite solar cells

Sheng

Yang

et al. 2023

Energy Environ. Sci.

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“…[ 7‐9 ] Currently, the major barrier which limits the commercialization of PVSCs is the poor stability issue owing to multiple internal and external degradation processes caused by moisture, oxygen, heat and ultraviolet (UV) radiation. [ 10‐14 ] To address abovementioned issues, there are proposed strategies for improving device stability under practical application, containing encapsulation, dopants engineering, composition engineering, interfacial engineering, etc . [ 15‐18 ] The moisture and oxygen induced instability can be eliminated by encapsulating PVSCs in a dry and oxygen‐free operating environment and the thermal stability can be enhanced by constructing 2D/3D stacking structure.…”

Section: Background and Originality Contentmentioning

confidence: 99%

Improving Ultraviolet Stability of Perovskite Solar Cells via Singlet Fission Down‐Conversion^†

et al. 2023

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The instability of perovskite materials under continuous ultraviolet (UV) light irradiation and high sensitivity in humid environments remain obstacles to future commercialization. Especially, the photovoltaic performance of perovskite solar cells (PVSCs) is prone to decline under UV light exposure for sustained periods of time. However, in conventional methods, preventing UV light from entering PVSCs usually comes at the expense of reducing short circuit photocurrent (J sc ). Herein, the UV stability of PVSCs is modified by introducing a singlet fission down-conversion layer 6,13-bis(triisopropylsilylethynyl) pentacene (TIPS-PEN) via one-step anti-solvent method without sacrificing device efficiency. The introduction of down conversion layer can not only improve the J sc by converting UV light into multiple excitons, but also enhance the open-circuit voltage (V oc ) owing to a better matched energy level alignment at the perovskite/spiro-OMeTAD interface. Consequently, the TIPS-PEN incorporated PVSCs attain the champion power conversion efficiency (PCE) up to 22.92% accompanied with dramatically increased UV photostability which can retain 80% of its primitive PCE under continuous UV light soaking for 150 h. Moreover, the unencapsulated PVSCs with TIPS-PEN exhibit remarkable moisture stability which can sustain over 80% of the initial value under air conditions (50% relative humidity, 25 °C) after 1000 h.

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Dual-Resistance of Ion Migration and Moisture Erosion via Hydrolytic Crosslinking of Siloxane Functionalized Poly(Ionic Liquids) for Efficient and Stable Perovskite Solar Cells

Cited by 36 publications

References 0 publications

Comprehensive Passivation for High‐Performance Quasi‐2D Perovskite LEDs

Comprehensive Passivation for High‐Performance Quasi‐2D Perovskite LEDs

Omnidirectional diffusion of organic amine salts assisted by ordered arrays in porous lead iodide for two-step deposited large-area perovskite solar cells

Improving Ultraviolet Stability of Perovskite Solar Cells via Singlet Fission Down‐Conversion^†

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Dual-Resistance of Ion Migration and Moisture Erosion via Hydrolytic Crosslinking of Siloxane Functionalized Poly(Ionic Liquids) for Efficient and Stable Perovskite Solar Cells

Cited by 36 publications

References 0 publications

Comprehensive Passivation for High‐Performance Quasi‐2D Perovskite LEDs

Comprehensive Passivation for High‐Performance Quasi‐2D Perovskite LEDs

Omnidirectional diffusion of organic amine salts assisted by ordered arrays in porous lead iodide for two-step deposited large-area perovskite solar cells

Improving Ultraviolet Stability of Perovskite Solar Cells via Singlet Fission Down‐Conversion†

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Improving Ultraviolet Stability of Perovskite Solar Cells via Singlet Fission Down‐Conversion^†