Br-containing alkyl ammonium salt-enabled scalable fabrication of high-quality perovskite films for efficient and stable perovskite modules

Xu, Zhongyuan; Chen, Ruihao; Wu, Yazhuo; He, Ruiqin; Yin, Jun; Lin, Wei Chun; Wu, Binghui; Li, Jing

doi:10.1039/c9ta09101g

Cited by 42 publications

(34 citation statements)

References 43 publications

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“…On the contrary, the efficiency of the controlled one rapidly degraded to 90% of the initial value in merely 10 days. The main reason of the optimized stability for GABr treated devices is the improved crystallinity with decreased defect states of the perovskite layer, which enhances its resistance to moisture, oxygen and/or light irradiation [ 27 , 55 ].…”

Section: Resultsmentioning

confidence: 99%

“…The rapid nucleation and grain growth might be the main reasons for the formationof defective films and the hysteresis is suspected to be caused by defect induced ion migration, the fundamental properties of MAPbI 3 , e.g., the dipole moment, and so on [ 24 ]. Therefore, GABr treatment on MAPbI 3 seems to be ideal in optimizing the device performance for the two reasons: (1) the nearly zero dipole moment of GA + is beneficial for adjusting the polarity for perovskite to reduce the hysteresis [ 25 , 26 ], (2) Br − will compete with I − in I-based perovskite and can retard the crystal process to achieve less-defective films [ 20 , 27 ]. However, the application of GABr post-treatment on MAPbI 3 PSCs with n-i-p planar structure has been rarely reported and it is worth exploring.…”

Section: Introductionmentioning

confidence: 99%

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GABr Post-Treatment for High-Performance MAPbI3 Solar Cells on Rigid Glass and Flexible Substrate

Chen

Zhang

et al. 2021

Nanomaterials

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Perovskite solar cells have exhibited astonishing photoelectric conversion efficiency and have shown a promising future owing to the tunable content and outstanding optoelectrical property of hybrid perovskite. However, the devices with planar architecture still suffer from huge Voc loss and severe hysteresis effect. In this research, Guanidine hydrobromide (GABr) post-treatment is carried out to enhance the performance of MAPbI3 n-i-p planar perovskite solar cells. The detailed characterization of perovskite suggests that GABr post-treatment results in a smoother absorber layer, an obvious reduction of trap states and optimized energy level alignment. By utilizing GABr post-treatment, the Voc loss is reduced, and the hysteresis effect is alleviated effectively in MAPbI3 solar cells. As a result, solar cells based on glass substrate with efficiency exceeding 20%, Voc of 1.13 V and significantly mitigated hysteresis are fabricated successfully. Significantly, we also demonstrate the effectiveness of GABr post-treatment in flexible device, whose efficiency is enhanced from 15.77% to 17.57% mainly due to the elimination of Voc loss.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

GABr Post-Treatment for High-Performance MAPbI3 Solar Cells on Rigid Glass and Flexible Substrate

Chen

Zhang

et al. 2021

Nanomaterials

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“…Besides, some additives can promote crystallization by adjusting the surface tension, wettability, and solution flow of perovskite solution. Zheng et al mixed the Br-containing tetrabutylammonium salt (TBAB) into the perovskite precursor and showed enhanced crystallization and wettability [46]. The low surface tension and small contact angle of perovskite solutions on the substrate of TBAB resulted in uniform large-area films.…”

Section: Non-perovskite-precursor Additivesmentioning

confidence: 99%

Section: Perovskite-precursor Additivesmentioning

confidence: 99%

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Large-area perovskite films for PV applications: A perspective from nucleation and crystallization

Yang

Xue

Чэн

et al. 2021

Journal of Energy Chemistry

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Configuration of Methylammonium Lead Iodide Perovskite Solar Cell and its Effect on the Device's Performance: A Review

Dahal

2022

Adv Materials Inter

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Since it is a source of clean energy, harnessing solar power is a natural solution to resolving the prevalent energy crisis. A solar cell is the most effective device to convert solar energy into electricity. Hence, a study on solar cells is the utmost area of interest in the energy sector.As illustrated in Figure 1, there are three generations of solar cells. Among these, the first-generation cells were of p-n homojunction on a silicon crystal, where the thickness of the absorbing layer was more than 180 µm. Mainly, silicon (Si) and germanium (Ge), indirect bandgap materials, assemble the cell. Single crystal silicon solar cells exhibit a conversion efficiency of about 26.7% and dominate the current solar cell market. [2] The second-generation solar cells are heterojunction solar cells using direct bandgap thin film materials (CdS, CIGS, etc.). The demerits of the first and second-generation solar cells are the cost of semiconducting materials, limited availability, and toxicity to human health. Emerging thirdgeneration solar cells act as an alternative. These include dyesensitized solar cells (DSSCs), organic photovoltaics, quantum dots, and perovskite solar cells (PSCs). Among all those, PSCs are at the center of the emerging photovoltaic technology with rapid improvement in the performance within a few years of discovering the first perovskite cell. Figure 2 depicts the different types of solar cells and their developmental trend for the past 46 years, showing that the performance of the PSCs has improved dramatically during a short period.The foundation technology for PSCs is DSSCs. In 1991, O'Regan and Grätzel developed a low-cost photochemical solar cell based on a high surface area nanocrystalline TiO 2 film sensitized with dye molecule. [4] The primary concern of DSSCs is the use of liquid electrolytes, which regenerate the dye after it injects electrons into the conduction band (CB) of the working electrodes (anode), which are mainly the thin layer of the metal oxide semiconductor. The electrolyte also acts as a hole transporting material to the counter electrodes (cathode). [5] The solid-state hole conductor emerged as a replacement to minimize leakage concerns in liquid electrolyte-based DSSCs. With several modifications in the device structures, researchers are trying to synthesize efficient DSSCs. However, the low absorption coefficientIn its initial phase in 2009, the inorganic-organic hybrid perovskite solar cells (PSCs) delivered a 3.8% power conversion efficiency (PCE), which is far below the present 25.7% PCE obtained in 2022. The significant improvement of the efficiency of PSCs in such a short period has stimulated significant interest in the photovoltaic community. However, the performance of current PSCs is behind the commercially available and widely used solar cells in terms of stability and scalability. Among various commonly studied perovskite materials, methylammonium lead iodide (MAPbI 3 ) is the most widely studied. This review will focus on the common solar cell structures (mesoporo...

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Br-containing alkyl ammonium salt-enabled scalable fabrication of high-quality perovskite films for efficient and stable perovskite modules

Abstract: The incorporation of a Br-containing tetrabutylammonium salt into perovskite precursors demonstrates superior advantages in both crystallization and large-area uniformity control during the scalable blade-coating of perovskite films.

Cited by 42 publications

References 43 publications

GABr Post-Treatment for High-Performance MAPbI3 Solar Cells on Rigid Glass and Flexible Substrate

GABr Post-Treatment for High-Performance MAPbI3 Solar Cells on Rigid Glass and Flexible Substrate

Large-area perovskite films for PV applications: A perspective from nucleation and crystallization

Configuration of Methylammonium Lead Iodide Perovskite Solar Cell and its Effect on the Device's Performance: A Review

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