17.3% efficiency CsPbI2Br solar cells by integrating a Near-infrared absorbed organic Bulk-heterojunction layer

Guo, Qiang; Dai, Zheng; Dong, Chuanqi; Ding, Yuanjia; Jiang, Naizhong; Wang, Zhibin; Gao, Lei; Duan, Chen; Guo, Qing

doi:10.1016/j.cej.2023.142025

Cited by 10 publications

(13 citation statements)

References 50 publications

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“…In addition, in the TPV test shown in Figure 7b, we found that the device treated with CDT‐S had the slowest decay, followed by the device treated with CDT‐N, while the control device showed the fastest decay. The slower TPV decay rate indicates that the recombination of charge carriers is suppressed, obviously due to the interaction between heterocyclic crown ethers on CDT‐S and CDT‐N molecules and Pb 2+ [46,47] . Faster charge transfer rate and decreased carrier recombination are important reasons for improving device performance.…”

Section: Resultsmentioning

confidence: 99%

“…We also provided the electrochemical impedance spectroscopy (EIS) of the devices (Figure S8). EIS is also an effective means to understand the charge transfer dynamics within devices [46,48] . According to EIS, we obtained the series resistances (R s ) of the control device, CDT‐S treated device, and CDT‐N treated device, which were 24.54 Ω, 12.81 Ω, and 15.08 Ω, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…The slower TPV decay rate indicates that the recombination of charge carriers is suppressed, obviously due to the interaction between heterocyclic crown ethers on CDT-S and CDT-N molecules and Pb 2 + . [46,47] Faster charge transfer rate and decreased carrier recombination are important reasons for improving device performance. We also provided the electrochemical impedance spectroscopy (EIS) of the devices (Figure S8).…”

Section: According To the Above Discussion The Cdt-s-and Cdt-ntreatme...mentioning

confidence: 99%

“…EIS is also an effective means to understand the charge transfer dynamics within devices. [46,48] According to EIS, we obtained the series resistances (R s ) of the control device, CDT-S treated device, and CDT-N treated device, which were 24.54 Ω, 12.81 Ω, and 15.08 Ω, respectively. The recombination resistances (R rec ) were 1112 Ω, 4040 Ω, and 3202 Ω, respectively.…”

Section: According To the Above Discussion The Cdt-s-and Cdt-ntreatme...mentioning

confidence: 99%

See 3 more Smart Citations

Organic Semiconductor Based on N, S‐Containing Crown Ether Enabling Efficient and Stable Perovskite Solar Cells

Chen,

Zeng,

Gao

et al. 2023

ChemSusChem

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The uncoordinated lead cations are ubiquitous in perovskite films and severely affect the efficiency and stability of perovskite solar cells (PSCs). In this work, 15‐crown‐5 with various heteroatoms are connected to the organic semiconductor carbazole diphenylamine, and two new compounds, CDT‐S and CDT‐N, are developed to modify the Pb2+ defects in perovskite films through the anti‐solvent method. Apart from the oxygen atoms, there are also N atoms on crown ether ring in CDT‐N, and both S and N heteroatoms in CDT‐S. The heteroatoms enhance the interaction between the crown ether‐based semiconductors and the undercoordinated Pb2+ defect in perovskite. Particularly, the stronger interaction between S atoms and Pb2+ further enhances the defect passivation effect of CDT‐S than CDT‐N, thereby more effectively suppressing the non‐radiative recombination of charge carriers. Finally, the efficiency of the device treated with CDT‐S is up to 23.05%. Moreover, the unencapsulated device based on CDT‐S maintained 90.5% of the initial efficiency after being stored under dark conditions for 1000 hours, demonstrating good long‐term stability. Our work demon‐strates that crown ethers are promising in perovskite solar cells, and the crown ether containing multiple heteroatoms could effectively improve both efficiency and stability of devices.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: According To the Above Discussion The Cdt-s-and Cdt-ntreatme...mentioning

confidence: 99%

Section: According To the Above Discussion The Cdt-s-and Cdt-ntreatme...mentioning

confidence: 99%

See 2 more Smart Citations

Organic Semiconductor Based on N, S‐Containing Crown Ether Enabling Efficient and Stable Perovskite Solar Cells

Chen,

Zeng,

Gao

et al. 2023

ChemSusChem

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“…The upshift of conduction band and Fermi energy level of the FAI@ZIF-8-treated film lead to a better energy level match between ETL and the perovskite film, which is beneficial in reducing the electron transfer barrier and inhibiting interfacial recombination. [63,64]…”

Section: Resultsmentioning

confidence: 99%

Interface Modification by FAI@ZIF‐8 for High‐Efficiency Perovskite Solar Cells

Lou

Cai

et al. 2023

Solar RRL

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The efficiency of perovskite solar cells (PSCs) has surpassed all other thin‐film solar cells. It is well known that the mismatch between the perovskite film and electron transport layer is an important factor to damage the stability of PSCs. Herein, an effective modification strategy to improve stability by using FAI@ZIF‐8 is demonstrated. It is found that the FAI@ZIF‐8 modification reduces the trap‐state density of the perovskite by slowly releasing FAI from the ZIF‐8 pore. Besides, FAI@ZIF‐8 improves energy‐level alignment at TiO2/perovskite interface, which facilitates electron extraction at the interface. As a consequence, an optimal power conversion efficiency (PCE) of 23.52% is achieved for the FAI@ZIF‐8‐treated PSCs. After storing under 20–30% relative humidity and room temperature for 2000 h, the FAI@ZIF‐8‐treated device sustains 96% of its initial PCE; nevertheless, the control device maintains only 73% of its initial PCE under the same conditions. This strategy is helpful to guide the development of high‐performance PSCs and promotes commercialization of perovskite materials.

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All‐Inorganic Perovskite Solar Cells: Modification Strategies and Challenges

Li,

Sun,

Xie

et al. 2024

Adv Energy and Sustain Res

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Cesium‐based all‐inorganic wide‐bandgap perovskite solar cells (AIWPSCs) have been demonstrated with exceptional optoelectronic properties such as intrinsic optical wide‐bandgap and high thermal stability, which make them suitable candidates for the front sub‐cells of tandem solar cells (TSCs). Passivation of perovskite surface and interface is a matter of common interest in this community since all‐inorganic perovskites always suffer from non‐ideal crystallization such as phase impurity, high defect density, and non‐uniform morphology. Despite these shortcomings, numerous efforts have been devoted in recent years to pursuing high‐performance AIWPSCs, which exhibit an abruptly increased power conversion efficiency (PCE) from 2.9% to over 21.0%. In view of not having a thorough summary about the advancements on AIWPSCs, herein, a comprehensive review is given to highlight the recent device performance progress of AIWPSC, particularly focusing on the strategies to passivate the defects of all‐inorganic perovskite, namely, additive engineering, solvent engineering, interface modification, and the exploration of new charge transport materials (CTMs) for improving the phase stability and PCE of AIWPSCs. Finally, a conclusive outlook on AIWPSCs will be given to provide our perspectives aiming to inspire the further development of AIWPSCs.

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17.3% efficiency CsPbI2Br solar cells by integrating a Near-infrared absorbed organic Bulk-heterojunction layer

Cited by 10 publications

References 50 publications

Organic Semiconductor Based on N, S‐Containing Crown Ether Enabling Efficient and Stable Perovskite Solar Cells

Organic Semiconductor Based on N, S‐Containing Crown Ether Enabling Efficient and Stable Perovskite Solar Cells

Interface Modification by FAI@ZIF‐8 for High‐Efficiency Perovskite Solar Cells

All‐Inorganic Perovskite Solar Cells: Modification Strategies and Challenges

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