Double-Side healing at CsPbI2Br/ZnO interface by bipyrimidine hydroiodide enables inverted solar cells with enhanced efficiency and stability

Yuan, Quan; Tang, Xiaoxuan; Shu, Qianwen; Zhu, Botao; Cai, Jiejin; He, Yunpeng; Zhou, Dong‐Ying; Feng, Lai

doi:10.1016/j.cej.2022.134760

Cited by 20 publications

(11 citation statements)

References 51 publications

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“…The long-term device stability was attributed to that BP-HI increased the hydrophobicity film surface, released tensile strain of CsPbI 2 Br films and inhibited I − ion migration along the perovskite grain boundaries from interacting with the Ag electrode. 28…”

Section: Strategies For Boosting the Performance And Stability Of Csp...mentioning

confidence: 99%

“…TiO 2 , SnO 2 , or NiO x with a TE : 0.1 B2 Â 10 À5 K À1 ) or a large temperature gradient from perovskite formation temperature (i.e., 4160 1C for CsPbI 2 Br) to RT inducing tensile strain at the perovskite/CTL interface, which leads to severe nonradiative charge recombination and V OC reduction. [24][25][26][27][28][29] In addition, the crystallization kinetics of the CsPbI 2 Br perovskite film is poor at low temperatures. 30 The CsPbI 2 Br film requires a high sintering temperature of 4250 1C to maintain the black cubic a-phase with excellent film morphology, 31 which is energy consuming and not suitable for flexible-based device application.…”

Section: Critical Challenges Of Cspbi 2 Br Pscsmentioning

confidence: 99%

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Inorganic CsPbI₂Br halide perovskites: from fundamentals to solar cell optimizations

Lim

Yang

Wei

2023

Energy Environ. Sci.

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Section: Strategies For Boosting the Performance And Stability Of Csp...mentioning

confidence: 99%

Section: Critical Challenges Of Cspbi 2 Br Pscsmentioning

confidence: 99%

Inorganic CsPbI₂Br halide perovskites: from fundamentals to solar cell optimizations

Lim

Yang

Wei

2023

Energy Environ. Sci.

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“…Yuan et al demonstrated a dual-sided healing strategy by introducing bipyrimidine hydroiodide (BP-HI) at the CsPbI 2 Br/ZnO interface, which achieved the simultaneous improvement of perovskite and ETL performance. [154] Nevertheless, the improvement of V OC and PCE of PSCs has always faced a significant challenge due to the limitation of thermodynamics. [155] On this ground, Wang and coworkers replaced the ETL with SnO 2 , which has high electron mobility (240 cm 2 v −1 s −1 ) and high stability.…”

Section: Passivation Of the Perovskite/etl Interfacementioning

confidence: 99%

Recent Progress on Defect Passivation of All‐Inorganic Halide Perovskite Solar Cells

Wang

Yin

Iqbal

et al. 2022

Adv Materials Inter

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high charge mobility and higher power conversion efficiency (PCE). [1][2][3][4][5] Nowadays, the maximum PCE of organic-inorganic hybrid perovskite solar cells (PSCs) has exceeded 25%. [6][7][8] However, organic cations in organic-inorganic hybrid perovskite materials are susceptible to volatilization by light, heat and other environmental factors, which severely impairs the performance and stability of the devices and hinders their maximum commercial utilization, [9][10][11] while all-inorganic perovskite exhibits excellent thermal and photostability due to the absence of unstable organic cations. Therefore, the development of all-inorganic PSCs is promising to consider the long-term application of the devices on the commercialization path. In recent years, more and more efforts have been focused on the performance enhancement of all-inorganic PSCs, and the PCEs have increased from 2.9% in 2015 to 21.0% in 2022. [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] To better visualize the development of defect passivation strategies for all-inorganic PSCs, we have drawn the efficiency development diagram for the all-inorganic halide PSCs including devices based on pure CsPbI 3 , CsPbBr 3 , and CsPbI 3−x Br x . Besides, the number of publications of these PSCs in recent years is also summarized. (Figure 1a,b).The different halide contents make all-inorganic perovskite (CsPbX 3 ) each have distinct advantages as well as disadvantages. For example, black cubic phase α-CsPbI 3 with a bandgap of 1.73 eV, achieved the highest PCE (21.0%) among all kinds of CsPbX 3 solar cells, [28] but it is effortless to transform rapidly to tetragonal phase β-CsPbI 3 (E g = 2.82 eV) under atmospheric humidity (room temperature), or even to yellow δ non-perovskite phase. CsPbI 3 perovskite is a yellow hexagonal δ-phase at room temperature, which is not suitable for photovoltaic applications. However, the photoactive black cubic phase CsPbI 3 can only keep stable at high temperature of above 300 °C. Although it has been recently reported that doping inside CsPbI 3 perovskite pseudohalide (SCN − ) can enhance the phase stability and device performance of CsPbI 3 , the preparation temperature is still as high as 180 °C. [29] Generally, the phase stability of CsPbI3 still is an important problem that needs to be solved.Compared to CsPbI 3 , CsPbBr 3 exhibits excellent humidity and thermal stability; nevertheless, its large band gap (E g = 2.30 eV), limits the corresponding devices only absorb photons with a maximum wavelength of 540 nm. [30] Therefore, All-inorganic halide perovskite materials have attracted increasing attentions in recent years due to their superior stability and adjustable band gap which make them very suitable for the top cells of multi-junction solar cells. Nonetheless, the power conversion efficiency of all-inorganic halide perovskite solar cells is still far from satisfaction. The widespread use of the conventional solution method in the preparation process causes many different defects and carrier t...

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“…Yuan et al introduced trace hydrophobic S8 into the C S PbI 2 Br precursor, which not only delayed the crystallization of α-CsPbI 2 Br perovskite but also passivated the grain boundary effectively and improved the photoelectric conversion efficiency . In addition, they creatively introduced bipyrimidine hydroiodide (BP-HI) at the CsPbI 2 Br/ZnO interface, which simultaneously improved the performance of perovskite and electron transport layer (ETL) through a double-side healing strategy …”

Section: Introductionmentioning

confidence: 99%

“…40 In addition, they creatively introduced bipyrimidine hydroiodide (BP-HI) at the CsPbI 2 Br/ZnO interface, which simultaneously improved the performance of perovskite and electron transport layer (ETL) through a double-side healing strategy. 41 Herein, propylamine hydrobromide (PABr) and its derivative 3-bromopropylamine hydrobromide (3Br-PABr) were used to passivate the surface defects of carbon-based CsPbI 2 Br perovskite films for the first time. The amino group in PABr reduced the defect state density of perovskite by combining with uncoordinated Pb 2+ ions.…”

Section: Introductionmentioning

confidence: 99%

Preparation of High-Efficiency (>14%) HTL-Free Carbon-Based All-Inorganic Perovskite Solar Cells by Passivation with PABr Derivatives

Huo

Sun

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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Due to the advantages of low cost and good thermal stability, all-inorganic CsPbI 2 Br carbon-based perovskite solar cells (C-PSCs) without a hole transport layer have been rapidly developed in recent years. While the carbon electrode is in direct contact with the CsPbI 2 Br film, higher requirements are placed on the defects and energy level arrangement of the CsPbI 2 Br layer, which leads to the relatively low photoelectric conversion efficiency (PCE) of C-PSCs. Herein, propylamine hydrobromide (PABr) and its derivative 3-bromopropylamine hydrobromide (3Br-PABr) were used to passivate the surface defects of CsPbI 2 Br C-PSCs for the first time. The results show that passivation molecules are modulated by the substituent effect, leading to a stronger interaction between amino groups and uncoordinated Pb 2+ ions, which facilitates a better passivation effect of 3Br-PABr. In addition, 3Br-PABr promotes the gradient arrangement of energy levels while passivating surface defects, which accelerates the rapid extraction of holes. After the passivation by PABr and 3Br-PABr, the PCE of HTL-free CsPbI 2 Br C-PSCs increased from 12.15% for the control device to 13.15 and 14.04%, respectively, which are among the highest reported values of CsPbI 2 Br C-PSCs.

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Double-Side healing at CsPbI2Br/ZnO interface by bipyrimidine hydroiodide enables inverted solar cells with enhanced efficiency and stability

Cited by 20 publications

References 51 publications

Inorganic CsPbI₂Br halide perovskites: from fundamentals to solar cell optimizations

Inorganic CsPbI₂Br halide perovskites: from fundamentals to solar cell optimizations

Recent Progress on Defect Passivation of All‐Inorganic Halide Perovskite Solar Cells

Preparation of High-Efficiency (>14%) HTL-Free Carbon-Based All-Inorganic Perovskite Solar Cells by Passivation with PABr Derivatives

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Double-Side healing at CsPbI2Br/ZnO interface by bipyrimidine hydroiodide enables inverted solar cells with enhanced efficiency and stability

Cited by 20 publications

References 51 publications

Inorganic CsPbI2Br halide perovskites: from fundamentals to solar cell optimizations

Inorganic CsPbI2Br halide perovskites: from fundamentals to solar cell optimizations

Recent Progress on Defect Passivation of All‐Inorganic Halide Perovskite Solar Cells

Preparation of High-Efficiency (>14%) HTL-Free Carbon-Based All-Inorganic Perovskite Solar Cells by Passivation with PABr Derivatives

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Product

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Inorganic CsPbI₂Br halide perovskites: from fundamentals to solar cell optimizations

Inorganic CsPbI₂Br halide perovskites: from fundamentals to solar cell optimizations