The Introduction of Defects in Ti3C2Tx and Ti3C2Tx‐Assisted Reduction of Graphene Oxide for Highly Selective Detection of ppb‐Level NO2 (Adv. Funct. Mater. 15/2022)

Yang, Zijie; Zou, Hongshuai; Zhang, Yueying; Liu, Fangmeng; Wang, Jing; Lv, Siyuan; Jiang, Li; Wang, Chenguang; Xu, Yan; Sun, Peng; Zhang, Lijun; Duan, Yu; Lu, Geyu

doi:10.1002/adfm.202270091

Cited by 8 publications

(6 citation statements)

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“…Notably, the film treated with BAAc RT exhibits the highest intensity at the (100) peak compared to the other samples, indicating improved crystallinity of the perovskite films. More importantly, the complete elimination of the PbI 2 signal at 12.6° by the BAAc RT passivation, [ 41 ] affirming the reaction between the ionic liquid and PbI 2 . [ 42,43 ] XPS spectra were collected to gain insight into the by‐products in order to delve deeper into the passivation mechanism of BAAc.…”

Section: Resultsmentioning

confidence: 93%

Room Temperature Ionic Liquid Capping Layer for High Efficiency FAPbI₃ Perovskite Solar Cells with Long‐Term Stability

Lou,

Xu,

et al. 2024

Advanced Science

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Ionic liquid salts (ILs) are generally recognized as additives in perovskite precursor solutions to enhance the efficiency and stability of solar cells. However, the success of ILs incorporation as additives is highly dependent on the precursor formulation and perovskite crystallization process, posing challenges for industrial‐scale implementation. In this study, a room‐temperature spin‐coated IL, n‐butylamine acetate (BAAc), is identified as an ideal passivation agent for formamidinium lead iodide (FAPbI3) films. Compared with other passivation methods, the room‐temperature BAAc capping layer (BAAc RT) demonstrates more uniform and thorough passivation of surface defects in the FAPbI3 perovskite. Additionally, it provides better energy level alignment for hole extraction. As a result, the champion n–i–p perovskite solar cell with a BAAc capping layer exhibits a power conversion efficiency (PCE) of 24.76%, with an open‐circuit voltage (Voc) of 1.19 V, and a Voc loss of ≈330 mV. The PCE of the perovskite mini‐module with BAAc RT reaches 20.47%, showcasing the effectiveness and viability of this method for manufacturing large‐area perovskite solar cells. Moreover, the BAAc passivation layer also improves the long‐term stability of unencapsulated FAPbI3 perovskite solar cells, enabling a T80 lifetime of 3500 h when stored at 35% relative humidity at room temperature in an air atmosphere.

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Section: Resultsmentioning

confidence: 93%

Room Temperature Ionic Liquid Capping Layer for High Efficiency FAPbI₃ Perovskite Solar Cells with Long‐Term Stability

Lou,

Xu,

et al. 2024

Advanced Science

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“…To better understand the crystal states of δ‐FAPbBr 3 , grazing‐incidence wide‐angle X‐ray scattering (GIWAXS) measurements were further performed at different incidence angles from 0.05° to 0.5° corresponding to the increased detection depth and the results are shown in Figure a,b. [ 14 ] For the FAPbBr 3 film growth on NiO X /PTAA layer, the diffraction signal of δ‐FAPbBr 3 at 0.85 nm –1 presents a ring shape, indicating the irregular orientation growth of δ‐FAPbBr 3 . However, for the FAPbBr 3 film growth on NiO X /2PACz layer, the diffraction signal of δ‐FAPbBr 3 is in a strong orientation in the direction parallel to the underlayer.…”

Section: Resultsmentioning

confidence: 99%

δ‐Phase Management of FAPbBr₃ for Semitransparent Solar Cells

Zhu

et al. 2023

Advanced Optical Materials

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ST-SCs due to proper band gap and stability. [4] However, the low PCE of FAPbBr 3 solar cells (SCs) seriously hinders their applications. Thus, many efforts have been made to improve the PCE of FAPbBr 3 SCs by additive engineering, [5] interface engineering, [6] and crystallization regulation. [7] For example, Ko et al. added cesium bromide to regulate lattice interactions of FAPbBr 3 with preferred orientation and obtained 8.56% of a PCE due to the highquality crystalline film. [8] Zhang et al. introduced guanidinium bromide to modulate the crystallization process, achieving a PCE of 8.92% with an open-circuit voltage (Voc) of 1.639 V for FAPbBr 3 SCs. [9] Liu et al. constructed 2D/3D perovskite interface by phenethylammonium bromide, which significantly passivated the interface defects and improved the PCE from 7.7% to 9.4%. [10] Although the PCE of FAPbBr 3 SCs has been improved, it is still unclear and rarely investigated on the effect of δ phase (δ-FAPbBr 3 ) on film and device properties. The photoinactive δ-FAPbBr 3 has a large band gap and chain structure, which may affect light absorption and carrier transport. [11] Therefore, the research on δ-FAPbBr 3 is of great significance for FAPbBr 3 SCs performance improvement.In this work, the key factors on the crystallization of δ-FAPbBr 3 and the effect of δ-FAPbBr 3 on device performance were systematically studied for the first time. The hydrophobic poly[bis(4phenyl) (2,4,6-trimethylphenyl) amine] (PTAA) underlayer induces random growth of δ-FAPbBr 3 and its aggregation at the bottom of the perovskite films, which bring more defects and hinder carrier transport. Contrarily, δ-FAPbBr 3 has more regular crystallization and uniform distribution on the hydrophilic (2-(9H-carbazol-9-yl) ethyl) phosphonic acid (2PACz) underlayer, which has less defect states and better carrier transport. By virtue of the management of δ-FAPbBr 3 and the passivation of the upper interface with a phosphonate/phosphine oxide dyad molecule (PE-TPPO), a PCE of 9.12% was obtained, which is the highest efficiency among the inverted FAPbBr 3 SCs. A ST-SC reached a LUE of 3.15% with a PCE of 7.44% and an AVT of 42.31%.

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“…Yang et al. [ 48 ] explored the effect of Ti─O vacancies on the adsorption of the target gas NO 2 to Ti 3 C 2 T x /TiO 2 /rGO sensitive material using density functional theory (DFT) calculations. The results showed that the formation of Ti─O vacancies lowered the NO 2 absorption energy on crumpled MXene sphere, and the target gas NO 2 was easily captured by the sensitive layer.…”

Section: Mechanism Of Wearable Sensors For Gas Monitoring At Room Tem...mentioning

confidence: 99%

Room Temperature Wearable Gas Sensors for Fabrication and Applications

Xiao

Wang

et al. 2023

Advanced Sensor Research

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The recent surge in demand for human–machine interaction (HMI), Internet of Things (IoTs), and artificial intelligence (AI) has created both opportunities and challenges for room‐temperature wearable gas sensors. These sensors serve as a source of perceptual information and can be easily integrated into wearable electronic devices due to their portability and miniaturization. In recent years, various types of wearable room temperature gas sensors have been developed for fields like environmental monitoring, healthcare, smart home, industrial security, food safety monitoring, and public security. These sensors not only adjust to the movements of human effortlessly but also have reduced power consumption. Therefore, room temperature wearable gas sensors hold great promise for the development of integrated intelligent gas sensing system worn on the human body. These sensors can be fabricated using various sensing materials to detect diverse target gases. This review provides a comprehensive summary of the preparation of sensing materials with extraordinary sensing capabilities at room temperature. Additionally, the article includes a brief discussion of the sensing mechanism, employing four models to explain it: oxygen adsorption, direct electron transfer, proton transfer, and ions conduction. Finally, this article discusses the various applications and future perspectives of room‐temperature wearable gas sensors.

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The Introduction of Defects in Ti₃C₂T_x and Ti₃C₂T_x‐Assisted Reduction of Graphene Oxide for Highly Selective Detection of ppb‐Level NO₂ (Adv. Funct. Mater. 15/2022)

Cited by 8 publications

References 0 publications

Room Temperature Ionic Liquid Capping Layer for High Efficiency FAPbI₃ Perovskite Solar Cells with Long‐Term Stability

Room Temperature Ionic Liquid Capping Layer for High Efficiency FAPbI₃ Perovskite Solar Cells with Long‐Term Stability

δ‐Phase Management of FAPbBr₃ for Semitransparent Solar Cells

Room Temperature Wearable Gas Sensors for Fabrication and Applications

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The Introduction of Defects in Ti3C2Tx and Ti3C2Tx‐Assisted Reduction of Graphene Oxide for Highly Selective Detection of ppb‐Level NO2 (Adv. Funct. Mater. 15/2022)

Cited by 8 publications

References 0 publications

Room Temperature Ionic Liquid Capping Layer for High Efficiency FAPbI3 Perovskite Solar Cells with Long‐Term Stability

Room Temperature Ionic Liquid Capping Layer for High Efficiency FAPbI3 Perovskite Solar Cells with Long‐Term Stability

δ‐Phase Management of FAPbBr3 for Semitransparent Solar Cells

Room Temperature Wearable Gas Sensors for Fabrication and Applications

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Product

Resources

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The Introduction of Defects in Ti₃C₂T_x and Ti₃C₂T_x‐Assisted Reduction of Graphene Oxide for Highly Selective Detection of ppb‐Level NO₂ (Adv. Funct. Mater. 15/2022)

Room Temperature Ionic Liquid Capping Layer for High Efficiency FAPbI₃ Perovskite Solar Cells with Long‐Term Stability

Room Temperature Ionic Liquid Capping Layer for High Efficiency FAPbI₃ Perovskite Solar Cells with Long‐Term Stability

δ‐Phase Management of FAPbBr₃ for Semitransparent Solar Cells