Efficient thin-film perovskite solar cells from a two-step sintering of nanocrystals

Peng, Yuhao; Huang, Junli; Zhou, Lue; Mu, Yuncheng; Han, Shuyao; Zhou, Shu; Gao, Pingqi

doi:10.1039/d2nr06745e

Cited by 7 publications

(6 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…24,25 CsPbBr 3 bulk film was fabricated from a careful design of sintering process of the CsPbBr 3 -NC film because typical solution deposition methods were of difficulty to adapt for the direct construction of bulk CsPbBr 3 devices (Figure S2). 26 Figure 1b−g shows scanning electronic microscopy (SEM) images of the perovskite-NC and bulk films together with corresponding distribution analysis of the grain size, which are well consistent with evolution of the optical absorption and photoluminescence (PL) spectra in Figure 1h,i.…”

Section: ■ Results and Discussionsupporting

confidence: 75%

Size and Surface Chemistry Effects on the Synaptic Behavior of Halide Perovskite Thin Films

Han,

Zhou,

Huang

et al. 2024

ACS Appl. Electron. Mater.

Self Cite

View full text Add to dashboard Cite

Halide perovskites are promising for energyefficient and reconfigurable artificial synapses due to the unique charge transport characteristic, i.e., ionic-electronic coupling. This work attempts to detangle the size and surface chemistry effects on perovskite-based synaptic memristors that remain elusive to date. Herein, three different perovskite-based memristors were constructed for mimicking the synaptic behavior: device 1 based on CsPbBr 3 -nanocrystal (NC) film terminated with short alky ligands, device 2 based on naked CsPbBr 3 -NC film, and device 3 based on CsPbBr 3 bulk film. In addition to emulating a series of essential synaptic functions, our results suggest that perovskite-NC films outperform their bulk counterpart in light of paired pulse facilitation (PPF) index and gain due to an increased trap density and enhanced ion transport. The incorporation of short alkyl ligands into the NC surface decreases the film conductance without suppression of charge transport, thereby reducing the on-state energy consumption. Using the best-performed NC device comprising a neuron network, we did a preliminary proof-of-concept demonstration of the potential for brain-inspired neuromorphic computing which was proved effective for digit recognition with a high accuracy of 94%. Our study signifies the importance of grain size and surface chemistry engineering for the development of high-performance robust synaptic memristors based on halide perovskites.

show abstract

Section: ■ Results and Discussionsupporting

confidence: 75%

Size and Surface Chemistry Effects on the Synaptic Behavior of Halide Perovskite Thin Films

Han,

Zhou,

Huang

et al. 2024

ACS Appl. Electron. Mater.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Since the cmcm phase is more stable than the γ-phase, this path would be a possible perovskite degradation path. More recently, Zhou et al obtained a 2D flake phase when the black CsPbBr 3 was heated via a one-pot synthesis method . By comparing the experiment XRD with the simulation XRD, we found that this phase would be the cmcm phase.…”

Section: Resultsmentioning

confidence: 71%

“…More recently, Zhou et al obtained a 2D flake phase when the black CsPbBr 3 was heated via a one-pot synthesis method. 29 By comparing the experiment XRD with the simulation XRD, we found that this phase would be the cmcm phase. Thus, the perovskite degradation in CsPbBr 3 may follow this mechanism.…”

Section: Phase Transition Pathway Of γ-Cspbi 3 Degradationmentioning

confidence: 92%

Resolving the Perovskite Degradation Mechanism by Machine Learning Potential: The Case of CsPbI₃

et al. 2023

View full text Add to dashboard Cite

The perovskite prototype is one of the most promising solar cell materials. However, perovskite suffers from a phase transition leading to thermodynamic instability, which tightly influences the solar cell operation performance. Thus, modulating transition dynamics would extend its lifetime, which needs an in-depth understanding of the potential energy surface (PES) and the phase transition kinetics at the atomic level. In this work, taking CsPbI 3 as an example of a perovskite prototype, we map out the PES and resolve the three lowest energy barrier paths of γ-CsPbI 3 degradation by using a stochastic surface walking method integrated with high-dimensional neural-network potential. Path I is γ-CsPbI 3 to hexagonal δ′-CsPbI 3 , a five-step transition with (110) Pv to (001) hex with the energy barrier 0.25 eV/f.u.; Path II is γ-CsPbI 3 to cmcm-CsPbI 3 , a two-step transition with an over all energy barrier 0.22 eV/f.u. and (001) Pv //(110) cmcm + [010] Pv // [001] cmcm ; Path III is γ-CsPbI 3 to δ-CsPbI 3 , a one-step transition without forming an inherent interface, with the highest energy barrier 0.34 eV/f.u. Interestingly, We find that with the substitution of the A-site and/or B-site by other atoms, such as Bi and Te, the γ-CsPbI 3 to δ-CsPbI 3 transition could be extensively hindered. In this work, by resolving the potential energy surface, we not only reveal the degradation mechanism at the atomic level but also find a way to design perovskites with high and long-term stability.

show abstract

“…Combination of sequential low and high temperature annealing resulted in CsPbBr 3 film without pores and impurity phases. 74…”

Section: Other Solution Methodsmentioning

confidence: 99%

“…Since prolonged sintering in high temperature could generate unwanted impurities such as PbCO 3 , a two‐step‐sintering process was adopted to precisely eliminate organic ligands and control the film morphology while minimizing damage to the perovskite. Combination of sequential low and high temperature annealing resulted in CsPbBr 3 film without pores and impurity phases 74 …”

Section: Various Manufacturing Strategies For Cspbbr3 Solar Cellsmentioning

confidence: 99%

Fabrication processes for all‐inorganic CsPbBr₃ perovskite solar cells

Park,

Yoon,

Kim

2023

EcoMat

View full text Add to dashboard Cite

All‐inorganic perovskite solar cells have shown great potential owing to their superior stability against thermal stress and moisture compared to organic–inorganic perovskite solar cells. However, there are some remaining issues in the all‐inorganic perovskite solar cell fabrication process, such as the low solubility of the perovskite precursors and the occurrence of the secondary phases. In this review, we focus on all‐inorganic CsPbBr3 perovskite solar cells and categorize them based on their fabrication process. Various processes and strategies that have been developed to solve the aforementioned issues including the general process of multistep spin coating are thoroughly investigated. Finally, a summary of the various processes for the all‐inorganic CsPbBr3 perovskite solar cells and an outlook for the development of highly efficient all‐inorganic perovskite solar cells are proposed.image

show abstract

Efficient thin-film perovskite solar cells from a two-step sintering of nanocrystals

Abstract: Creating semiconductor thin films from sintering of colloidal nanocrystals (NCs) represents a very important technology for high throughput and low cost thin-film photovoltaics. Here we report the creation of all-inorganic...

Cited by 7 publications

References 46 publications

Size and Surface Chemistry Effects on the Synaptic Behavior of Halide Perovskite Thin Films

Size and Surface Chemistry Effects on the Synaptic Behavior of Halide Perovskite Thin Films

Resolving the Perovskite Degradation Mechanism by Machine Learning Potential: The Case of CsPbI₃

Fabrication processes for all‐inorganic CsPbBr₃ perovskite solar cells

Contact Info

Product

Resources

About

Efficient thin-film perovskite solar cells from a two-step sintering of nanocrystals

Abstract: Creating semiconductor thin films from sintering of colloidal nanocrystals (NCs) represents a very important technology for high throughput and low cost thin-film photovoltaics. Here we report the creation of all-inorganic...

Cited by 7 publications

References 46 publications

Size and Surface Chemistry Effects on the Synaptic Behavior of Halide Perovskite Thin Films

Size and Surface Chemistry Effects on the Synaptic Behavior of Halide Perovskite Thin Films

Resolving the Perovskite Degradation Mechanism by Machine Learning Potential: The Case of CsPbI3

Fabrication processes for all‐inorganic CsPbBr3 perovskite solar cells

Contact Info

Product

Resources

About

Resolving the Perovskite Degradation Mechanism by Machine Learning Potential: The Case of CsPbI₃

Fabrication processes for all‐inorganic CsPbBr₃ perovskite solar cells