New insight into solvent engineering technology from evolution of intermediates via one-step spin-coating approach

Ren, Yingke; Duan, Bin; Xu, Yishen; Huang, Yang; Li, Zhaoqian; Hu, Linhua; Hayat, Tasawar; Wang, Hongxia; Zhu, Jun; Dai, Songyuan

doi:10.1007/s40843-017-9027-1

Cited by 54 publications

(28 citation statements)

References 28 publications

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“…The crystal growth kinetics are closely related to surface property of substrate, composition and concentration of precursors, additives, annealing temperature, and atmosphere condition [19][20][21][22]. Controlling the procedure of nucleation and growth during film deposition and annealing is a promising route to morphology management and device optimization [23,24]. For large-area preparation, it is generally difficult to obtain high-quality perovskite films, leading to moderate device efficiency.…”

Section: Fundamental Working Principles Of Perovskite Optoelectronic mentioning

confidence: 99%

Two-dimensional organic-inorganic hybrid perovskite: from material properties to device applications

Cai

Cheng

et al. 2018

Sci. China Mater.

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Section: Fundamental Working Principles Of Perovskite Optoelectronic mentioning

confidence: 99%

Two-dimensional organic-inorganic hybrid perovskite: from material properties to device applications

Cai

Cheng

et al. 2018

Sci. China Mater.

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“…This demonstrates that the MCP method could increase the speed of nucleation and help to promote the nucleation of the perovskite seed even before the annealing stage. When the mixed-cation (FAI/MAI) solution was dripped onto the FAI-PbI 2 -DMSO intermediates, the FAI/MAI might substitute the previous FA + and create a new intermediate product, which might be more analogous to the final perovskite structure [5,24]. In the case of the MCP method, the FAI/MAI treatment solution played a role not only by participating in the substitution reaction but also by reducing the Gibbs free energy of the original FAI-PbI 2 -DMSO system [25].…”

Section: Resultsmentioning

confidence: 99%

Advanced partial nucleation for single-phase FA0.92MA0.08PbI3-based high-efficiency perovskite solar cells

et al. 2019

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To date, extensive research has been carried out, with considerable success, on the development of highperformance perovskite solar cells (PSCs). Owing to its wide absorption range and remarkable thermal stability, the mixedcation perovskite FA x MA 1−x PbI 3 (formamidinium/methylammonium lead iodide) promises high performance. However, the ratio of the mixed cations in the perovskite film has proved difficult to control with precursor solution. In addition, the FA x MA 1−x PbI 3 films contain a high percentage of MA + and suffer from serious phase separation and high trap states, resulting in inferior photovoltaic performance. In this study, to suppress phase separation, a post-processing method was developed to partially nucleate before annealing, by treating the as-prepared intermediate phase FAI-PbI 2-DMSO (DMSO: dimethylsulfoxide) with mixed FAI/MAI solution. It was found that in the final perovskite, FA 0.92 MA 0.08 PbI 3 , defects were substantially reduced because the analogous molecular structure initiated ion exchange in the post-processed thin perovskite films, which advanced partial nucleation. As a result, the increased light harvesting and reduced trap states contributed to the enhancement of open-circuit voltage and short-circuit current. The PSCs produced by the post-processing method presented reliable reproducibility, with a maximum power conversion efficiency of 20.80% and a degradation of~30% for 80 days in standard atmospheric conditions.

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“…Generally, it involves the use of one high boiling strong base polar aprotic solvent which can form a stable IP with precursor after quenching of low boiling solvent (volatile) due to anti-solvent washing, as illustrated in Fig. 4 [43,44]. Just like mentioned earlier, co-solvents are used to enhance the morphology of the perovskite layers [24].…”

Section: Lewis Acid-base Adduct Approachmentioning

confidence: 99%

Elucidating the dynamics of solvent engineering for perovskite solar cells

et al. 2018

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Researchers working in the field of photovoltaic are exploring novel materials for the efficient solar energy conversion. The prime objective of the discovery of every novel photovoltaic material is to achieve more energy yield with easy fabrication process and less production cost features. Perovskite solar cells (PSCs) delivering the highest efficiency in the passing years with different stoichiometry and fabrication modification have made this technology a potent candidate for future energy conversion materials. Till now, many studies have shown that the quality of active layer morphology, to a great extent, determines the performance of PSCs. The current and potential techniques of solvent engineering for good active layer morphology are mainly debated using primary solvent, co-solvent (Lewis acid-base adduct approach) and solvent additives. In this review, the dynamics of numerously reported solvents on the morphological characteristics of PSCs active layer are discussed in detail. The intention is to get a clear understanding of solvent engineering induced modifications on active layer morphology in PSC devices via different crystallization routes. At last, an attempt is made to draw a framework based on different solvent coordination properties to make it easy for screening the potent solvent contender for desired PSCs precursor for a better and feasible device.

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New insight into solvent engineering technology from evolution of intermediates via one-step spin-coating approach

Abstract: The anti-polar solvent technique is an effec-

Cited by 54 publications

References 28 publications

Two-dimensional organic-inorganic hybrid perovskite: from material properties to device applications

Two-dimensional organic-inorganic hybrid perovskite: from material properties to device applications

Advanced partial nucleation for single-phase FA0.92MA0.08PbI3-based high-efficiency perovskite solar cells

Elucidating the dynamics of solvent engineering for perovskite solar cells

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