Mitigating lattice strain and phase segregation of mixed-halide perovskite films via dual chloride additive strategy toward highly efficient and stable perovskite solar cells

Wang, Mingliang; Lu, Yao; Huo, Xiaomin; Cai, Qingrui; Yao, Yao; Zhang, Yanqiu; Song, Dandan; Xu, Zheng; Chen, Shuiyuan; Chen, Guilin; Li, Xiaodan; Wei, Dong

doi:10.1016/j.jpowsour.2023.232753

Cited by 8 publications

(10 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…93 (f ) Comparison of micro-strain after modification of monochloride and dichloride additives; the phase separation activation energy under different modification conditions was calculated, respectively. 15 caused by the perovskite film manufacturing process, they tried to change the temperature gradient during film annealing, providing a reverse temperature gradient by flipping the film sample. Interestingly, the tensile strain of the sample was significantly reduced after this treatment (Fig.…”

Section: Inhibiting Phase Segregation Of Mixed Perovskitementioning

confidence: 99%

“…7e). Wei et al 15 developed a dual-chloride additive strategy to solve the microstrain and phase separation problems in perovskite films.…”

Section: Inhibiting Phase Segregation Of Mixed Perovskitementioning

confidence: 99%

“…This is attributed to the small exciton binding energy and long carrier diffusion length of perovskite materials. 2,3 The classical PSCs are generally composed of a transparent conductive substrate, carrier transport layer, perovskite layer and metal electrode. The perovskite layer absorbs photons and produces photogenerated excitons.…”

Section: Introductionmentioning

confidence: 99%

“…(e) The distribution of residual strain of perovskite films at different depths; cross-sectional TEM imaging of PSCs 93. (f ) Comparison of micro-strain after modification of monochloride and dichloride additives; the phase separation activation energy under different modification conditions was calculated, respectively 15.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Microstress for metal halide perovskite solar cells: from source to influence and management

Lei,

Liu,

et al. 2024

Nanoscale

View full text Add to dashboard Cite

show abstract

Section: Inhibiting Phase Segregation Of Mixed Perovskitementioning

confidence: 99%

“…7e). Wei et al 15 developed a dual-chloride additive strategy to solve the microstrain and phase separation problems in perovskite films.…”

Section: Inhibiting Phase Segregation Of Mixed Perovskitementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Microstress for metal halide perovskite solar cells: from source to influence and management

Lei,

Liu,

et al. 2024

Nanoscale

View full text Add to dashboard Cite

show abstract

“…[20,26] These experimental results and theoretical calculations indicated that relaxation strain significantly improves the activation energy related to the phase segregation of mixedhalide WBG perovskite films. [27] It was also discovered that converting the tensile strain to compressive strain in the mixed-halide WBG perovskite films can mitigate light-induced phase segregation. [21] The device based on the compressively strained mixed-halide WBG perovskite achieved a high PCE of 20.53% and continued to operate at maximum power point after 2500 h, maintaining 83.60% of its initial PCE.…”

Section: Introductionmentioning

confidence: 99%

Strain Control of Mixed‐Halide Wide‐Bandgap Perovskites for Highly Efficient and Stable Solar Cells

Li,

Feng

et al. 2023

Solar RRL

View full text Add to dashboard Cite

Mixed‐halide perovskites with wide‐bandgap (WBG) have been widely applied for tandem solar cells. Nevertheless, WBG PSCs easily suffer from photo‐induced phase segregation, deteriorating their device efficiency and stability. It is desirable that the suppression of phase segregation from the strain relaxation in mixed‐halide WBG perovskite films. Here, p‐toluene sulfonate (p‐TS) could effectively release the residual strain in WBG perovskite films by occupying the empty orbitals of the uncoordinated Pb2+ and halide ion vacancies via the ionic bond and the coordination bond, as well as improving the crystallinity and passivating the defect states. The outcomes of this strain relaxation are observed to be highly effective in inhibiting phase segregation in WBG perovskite films. Based on the WBG perovskite with p‐TS, the significantly improved power conversion efficiency (PCE) of 21.12% is accomplished with the lowest open‐circuit voltage (VOC) deficits (410 mV) for the n‐i‐p PSCs with an optical E g of 1.66 eV. And satisfactory stability of PSC has been gained, the encapsulated device maintains efficiency over 82% of the original efficiency after 1000 h continuous illumination (1‐Sun, ∽40 °C). Besides, the p‐TS PSC maintains 98.9% of the initial PCE after 4000 h storage in the dry condition (∽10‐20% RH, ∽30 °C).This article is protected by copyright. All rights reserved.

show abstract

Enhancing the Stability and Efficiency of Inverted Perovskite Solar Cells with a Mixed Ammonium Ligands Passivation Strategy

Lee,

Kang,

Kwon

et al. 2023

Small Methods

View full text Add to dashboard Cite

The perovskite solar cell (PSC), which has achieved efficiencies of more than 26%, is expected to be a promising technology that can alternate silicon‐based solar cells. However, the performance of PSCs is still limited due to defects and ion migration that occur at the large number of grain boundaries present in perovskite thin films. In this study, the mixed ammonium ligands passivation strategy (MAPS) is demonstrated, which combines n‐octylammonium iodide (OAI) and 1,3‐diaminopropane (DAP) can effectively suppress the grain boundary defects and ion migration through grain boundaries by the synergistic effect of OAI and DAP, resulting in improved efficiency and stability of PSCs. It has also been revealed that MAPS not only enhances crystallinity and reduces grain boundaries but also improves charge transport while suppressing charge recombination. The MAPS‐based opaque PSC shows the best power conversion efficiency (PCE) of 21.29% with improved open‐circuit voltage (VOC) and fill factor (FF), and retained 84% of its initial PCE after 1900 h at 65 °C in N2 atmosphere. Amazingly, the MAPS‐based semi‐transparent PSC (STP‐PSC) retained 94% of their maximum power (21.00% at around 10% AVT) after 1000 h under 1 sun illumination and MAPS‐based perovskite submodule (PSM) achieved a PCE of 19.59%, which is among the highest values reported recently.

show abstract

Mitigating lattice strain and phase segregation of mixed-halide perovskite films via dual chloride additive strategy toward highly efficient and stable perovskite solar cells

Cited by 8 publications

References 51 publications

Microstress for metal halide perovskite solar cells: from source to influence and management

Microstress for metal halide perovskite solar cells: from source to influence and management

Strain Control of Mixed‐Halide Wide‐Bandgap Perovskites for Highly Efficient and Stable Solar Cells

Enhancing the Stability and Efficiency of Inverted Perovskite Solar Cells with a Mixed Ammonium Ligands Passivation Strategy

Contact Info

Product

Resources

About