Top‐Down Induced Crystallization Orientation toward Highly Efficient p‐i‐n Perovskite Solar Cells

Jiang, Xiaofen; Liu, Baoze; Wu, Xin; Zhang, Shoufeng; Zhang, Dong; Wang, Xue; Gao, Shuang; Huang, Zongming; Wang, Haolin; Li, Bo; Xiao, Zhengguo; Chen, Tao; Jen, Alex K.‐Y.; Xiao, Shuang; Yang, Shangfeng; Zhu, Zonglong

doi:10.1002/adma.202313524

Cited by 20 publications

(2 citation statements)

References 58 publications

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“…The control film shows a wide PL intensity distribution, indicating an imbalance in charge extraction. By contrast, the introduction of the ferrocenyl compounds leads to a reduced PL intensity, and the ferrocenyl-treated films display more uniform PL emission, which further verifies that the carrier extraction is improved and homogenized . In Figure i, the carrier lifetime, obtained by fitting the time-resolved PL spectra (Table S6), decreases from 102.44 to 4.87 ns as the number of Fc units increases.…”

Section: Resultsmentioning

confidence: 72%

“…By contrast, the introduction of the ferrocenyl compounds leads to a reduced PL intensity, and the ferrocenyl-treated films display more uniform PL emission, which further verifies that the carrier extraction is improved and homogenized. 46 In Figure 2i, the carrier lifetime, obtained by fitting the timeresolved PL spectra (Table S6), decreases from 102.44 to 4.87 ns as the number of Fc units increases. The reduction of PL intensity and lifetime implies improved charge extraction from the perovskite to ETL.…”

Section: ■ Results and Discussionmentioning

confidence: 95%

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Highly Efficient and Scalable p-i-n Perovskite Solar Cells Enabled by Poly-metallocene Interfaces

Li,

Gao,

Sheppard

et al. 2024

J. Am. Chem. Soc.

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Inverted p-i-n perovskite solar cells (PSCs) are easy to process but need improved interface characteristics with reduced energy loss to prevent efficiency drops when increasing the active photovoltaic area. Here, we report a series of poly ferrocenyl molecules that can modulate the perovskite surface enabling the construction of small-and large-area PSCs. We found that the perovskite−ferrocenyl interaction forms a hybrid complex with enhanced surface coordination strength and activated electronic states, leading to lower interfacial nonradiative recombination and charge transport resistance losses. The resulting PSCs achieve an enhanced efficiency of up to 26.08% for small-area devices and 24.51% for large-area devices (1.0208 cm 2 ). Moreover, the large-area PSCs maintain >92% of the initial efficiency after 2000 h of continuous operation at the maximum power point under 1sun illumination and 65 °C.

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Section: Resultsmentioning

confidence: 72%

Section: ■ Results and Discussionmentioning

confidence: 95%

Highly Efficient and Scalable p-i-n Perovskite Solar Cells Enabled by Poly-metallocene Interfaces

Li,

Gao,

Sheppard

et al. 2024

J. Am. Chem. Soc.

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Preferred Crystallographic Orientation via Solution Bathing for High‐Performance Inverted Perovskite Photovoltaics

Zhang,

Shang,

Wang

et al. 2024

Adv Funct Materials

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The meticulous control of crystal facets in polycrystalline perovskite films offers valuable insights into the photoelectric properties, varying significantly with different orientations. Exploring effective means to regulate these facets is crucial, and further revealing the underlying mechanisms is needed. Here, the research employed green solution bathing to obtain high‐quality perovskite films with preferred crystallographic orientation. In brief, eco‐friendly 2‐pentanol is used as the solvent, and functional molecules 2‐(dimethylaminomethyl)‐4‐(2‐aminoethylthiomethyl)thiazole (DAT) are introduced into the solution bathing as the solute. By introducing DAT molecules, precise control over perovskite crystal nucleation kinetics is achieved, resulting in films with a preferential (100) facet orientation. Conversely, films without DAT exhibited distinct (111) facet orientation. The regulation of DAT on perovskite film crystal facet is verified through theoretical and crystallographic analyses. Theoretical calculations show that S atom of DAT binds most strongly to the (100) facet of FAPbI3, promoting surface energy reduction and thermodynamic enhancement, favoring (100) crystal orientation. Crystallographic characterization further proved the regulation effect. In addition, PL/TRPL tests confirm the regulation of DAT on superior photoelectric properties of (100)‐oriented perovskite films. The work introduces a novel approach and preparation process for regulating the crystal facets orientation of polycrystalline perovskite films.

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Bidirectional Synergistic Crystallization Strategy for Regulating Growth Kinetics Toward Highly Efficient and Stable Perovskite Solar Cells

Wei,

Wang,

Cai

et al. 2024

Adv Funct Materials

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Crystalline quality is paramount for the performance and stability of perovskite films and devices. By regulating the nucleation and growth processes, it is possible to significantly enhance the crystalline quality. This work introduces a bidirectional synergistic crystallization strategy (BSC strategy) that synchronizes the crystallization kinetics across both the top and bottom surfaces of the perovskite film, thereby enhancing film quality and boosting the efficiency of perovskite solar cells (PSCs). Employing time‐resolved optical characterization techniques, it is demonstrated that the BSC strategy effectively mitigates the dissolution–recrystallization cycle of the perovskite nuclei and grains during annealing, accelerates the evaporation of residual solvents at the bottom of the perovskite film, and suppresses void formation at the buried interface. Depth‐resolved grazing‐incidence wide‐angle scattering analyses further confirm that the BSC strategy improves the crystalline quality of the perovskite film, promotes oriented growth, and minimizes internal residual strains caused by uneven growth dynamics. This approach results in a champion device efficiency of 24.98%, with the low voltage deficit of 360 mV. Moreover, device stability is markedly enhanced, after 1000 h of continuous light exposure, the efficiency remains over 91% of the initial value.

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Top‐Down Induced Crystallization Orientation toward Highly Efficient p‐i‐n Perovskite Solar Cells

Cited by 20 publications

References 58 publications

Highly Efficient and Scalable p-i-n Perovskite Solar Cells Enabled by Poly-metallocene Interfaces

Highly Efficient and Scalable p-i-n Perovskite Solar Cells Enabled by Poly-metallocene Interfaces

Preferred Crystallographic Orientation via Solution Bathing for High‐Performance Inverted Perovskite Photovoltaics

Bidirectional Synergistic Crystallization Strategy for Regulating Growth Kinetics Toward Highly Efficient and Stable Perovskite Solar Cells

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