Visualizing Nucleation and Growth Process of Vanadium‐Supramolecular Nanoribbons Self‐Assembled by Rapid Cooling Method towards High‐Capacity Vanadium Nitride Anode Materials (Adv. Energy Mater. 13/2022)

Yang, Yunlong; Wang, Yanqin; Zhao, Lei; Liu, Ying; Ran, Fen

doi:10.1002/aenm.202270052

Cited by 7 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Compared with the Control and CBECV perovskite films, CBEV can significantly accelerate the extraction and collection of the hole from perovskite to HTL transport layer (Figure 5c). [ 61 ] This is attributed to the fact that CBEV undergoes a phase transition, diffusing from the interior of the perovskite to the surface of the perovskite film and passivating the surface defects. Through kelvin probe force microscopy (KPFM) measurements, the surface potential (the value is denoted as R a ) of CBEV perovskite films ( R a = 20.30 mV) is much higher than those of the CBECV (( R a = 16.50 mV) and Control perovskite films (( R a = 9.65 mV) (Figure 5d–f), which is consistent with Ultraviolet photoelectron spectroscopy (UPS) results (Figures S16 and S17, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Understanding Microstructural Development of Perovskite Crystallization for High Performance Solar Cells

Ma,

Du,

Chen

et al. 2023

Advanced Materials

View full text Add to dashboard Cite

Solution crystallization in film devices has attracted broad interest from various fields such as perovskite solar cells. However, the detailed perovskite crystallization kinetics remain unclear due to the difficulty of in situ observation of grain cluster growth during annealing. This article presents the development of an in situ laser scanning confocal polarized microscopy with a temperature‐controlled stage to observe nucleation and growth of perovskite crystal clusters. It is found that enhanced interactions by a liquid crystal with perovskite form a new intermediate complex that induces diffusion‐controlled growth according to Avrami equation. The retarded cluster growth (63 nm s−1) originates from enlarged diffusion activation energy 40 kJ mol−1 compared with 152 nm s−1 and 37 kJ mol−1 for the Control film during annealing. Finally, the optimized perovskite films with enhanced crystallographic and optical characteristics are applied in solar cells to achieve a champion efficiency of 24.53% with open circuit voltage of 1.172 V and fill factor of 82.78%. The bare device without any protection maintains 89% of its initial efficiency after 6600 h of aging in ambient environment. This work implies that the in situ observation using fluorescence microscopy is a critical for understanding of crystallization kinetics in film devices.

show abstract

Section: Resultsmentioning

confidence: 99%

Understanding Microstructural Development of Perovskite Crystallization for High Performance Solar Cells

Ma,

Du,

Chen

et al. 2023

Advanced Materials

View full text Add to dashboard Cite

show abstract

“…Space‐current‐limited current (SCLC) model was used to estimate the defect state density of the electron‐only devices (FTO/SnO 2 /perovskite/with or without 4‐APN/C 60 /Ag) (Figure 3c) and hole‐only devices (FTO/NiO x /perovskite/with or without 4‐APN/spiro‐OMeTAD/Ag) [50] (Figure 3d). At a low bias voltage, the kink point of the dark J ‐ V curve is identified as the trap‐filling limit voltage ( V TFL ) [51,52] .…”

Section: Resultsmentioning

confidence: 99%

Highly Stable Perovskite Solar Cells Based on the Efficient Interaction between Pb²⁺ and Cyano Groups of 4‐Aminophthalonitrile

Duan,

Lin,

et al. 2023

Chemistry A European J

View full text Add to dashboard Cite

Defects present on the top surface of perovskite films have a pronounced detrimental impact on the photovoltaic performance and stability of perovskite solar cells (PSCs). Consequently, the development of effective defect passivation strategies has become key in enhancing both the power conversion efficiency (PCE) and stability of PSCs. In this study, a small molecule material, 4‐Aminophthalonitrile (4‐APN), was introduced as a means to mitigate surface defects within perovskite films. Obviously, 4‐APN effectively passivates the defects at grain boundaries by combining cyano groups (−C≡N) with Pb2+, significantly reducing the density of defect states, inhibiting non‐radiative recombination at the interface, and promoting the charge transfer efficiency from the perovskite layer to the hole transport layer. The 4‐APN modification led to a significant upswing in the PCE, while concurrently bolstering the overall device stability. Importantly, the devices on 4‐APN as passivation additive exhibited negligible performance degradation aging for 1200 h.

show abstract

“…As shown in Figure 5e, the unpacked PSMs were able to retain more than 96% of their initial PCE value after 620 h. These results highlight the incredible reliability and longevity of photovoltaic performance for the carbon‐based large‐area quasi‐two‐dimensional perovskite cell modules based on multifunctional CATNI interfacial engineering. [ 42 ]…”

Section: Resultsmentioning

confidence: 99%

Fully Printed High‐Performance Quasi‐Two‐Dimensional Perovskite Solar Cells via Multifunctional Interfacial Engineering

Wang,

Yang,

et al. 2023

Adv Funct Materials

View full text Add to dashboard Cite

Planar n–i–p carbon perovskite solar cells (PSCs) with a hole transport layer that can be fabricated at low temperatures at low‐cost exhibit great potential for large‐scale manufacturing. Moreover, 2D perovskites have attracted considerable attention owing to their higher stability. In this work, scalable and highly efficient fully printed large‐area carbon electrode‐based 2D perovskite modules are reported through the insertion of a thin naphthaleneimide derivative (CATNI)‐based interfacial layer between tin (IV) oxide and the perovskite layer. The results show that this facilitates the formation of the interfacial contact, suppresses energy losses, and substantially improves the performance parameters of the PSCs, especially their VOC value. A significantly enhanced VOC of 1.13 V is achieved resulting in the device PCE value reaching over 18%, which is one of the highest reported for fully printed PSCs so far. It is found that with the deployment of this CATNI‐based interfacial layer, a more efficient carrier extraction is achieved. This ultimately contributed to enhanced spectral response as well as improved VOC for these carbon electrodes based on fully printed devices. Finally, the carbon‐perovskite solar modules (carbon‐PSMs) are fabricated on ITO glass substrates with dimensions of 5.0 × 5.0 cm. These prepared modules exhibited outstanding photovoltaic performance with the highest PCE value of over 14.6%.

show abstract

Visualizing Nucleation and Growth Process of Vanadium‐Supramolecular Nanoribbons Self‐Assembled by Rapid Cooling Method towards High‐Capacity Vanadium Nitride Anode Materials (Adv. Energy Mater. 13/2022)

Cited by 7 publications

References 0 publications

Understanding Microstructural Development of Perovskite Crystallization for High Performance Solar Cells

Understanding Microstructural Development of Perovskite Crystallization for High Performance Solar Cells

Highly Stable Perovskite Solar Cells Based on the Efficient Interaction between Pb²⁺ and Cyano Groups of 4‐Aminophthalonitrile

Fully Printed High‐Performance Quasi‐Two‐Dimensional Perovskite Solar Cells via Multifunctional Interfacial Engineering

Contact Info

Product

Resources

About

Visualizing Nucleation and Growth Process of Vanadium‐Supramolecular Nanoribbons Self‐Assembled by Rapid Cooling Method towards High‐Capacity Vanadium Nitride Anode Materials (Adv. Energy Mater. 13/2022)

Cited by 7 publications

References 0 publications

Understanding Microstructural Development of Perovskite Crystallization for High Performance Solar Cells

Understanding Microstructural Development of Perovskite Crystallization for High Performance Solar Cells

Highly Stable Perovskite Solar Cells Based on the Efficient Interaction between Pb2+ and Cyano Groups of 4‐Aminophthalonitrile

Fully Printed High‐Performance Quasi‐Two‐Dimensional Perovskite Solar Cells via Multifunctional Interfacial Engineering

Contact Info

Product

Resources

About

Highly Stable Perovskite Solar Cells Based on the Efficient Interaction between Pb²⁺ and Cyano Groups of 4‐Aminophthalonitrile