Enhanced efficiency and thermal stability of perovskite solar cells using poly(9-vinylcarbazole) modified perovskite/PCBM interface

Zhang, Jiankai; Mao, Wujian; Duan, Jiaji; Huang, Sumei; Zhang, Zhejuan; Ou‐Yang, Wei; Zhang, Xuehua; Sun, Zhenrong; Chen, Xiaohong

doi:10.1016/j.electacta.2019.06.102

Cited by 29 publications

(19 citation statements)

References 52 publications

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“…This fact has been corroborated by the SEM analysis depicting larger size of crystallites and is expected to play a crucial role in the suppression of ion migration during heating. In fact, previous studies have revealed that ion migration stimulated by heat can be largely suppressed when perovskite crystals get larger, due to smaller grain boundaries and lower structural disorder and defects …”

Section: Resultsmentioning

confidence: 99%

“…During heat treatment, which also amplifies other degradation mechanisms, e. g. moisture penetration, the organic cation diffuses in the form of derivatives CH 3 NH 2 , I 2 and HI, which subsequently sublime into the gas phase. In general the strategies proposed against thermal instability of PSCs pertain either to the improvement of the quality of the perovskite film (e. g. by surface passivation, insertion of additives, and incorporation of inorganic cations) or to interface engineering approaches …”

Section: Introductionmentioning

confidence: 99%

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Dye Engineered Perovskite Solar Cells under Accelerated Thermal Stress and Prolonged Light Exposure

et al. 2020

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Herein, the thermal and light stability enhancement of planar perovskite solar cells (PSCs) based on the approach of dyesensitization of the titania compact layer with the triphenylamine-based metal-free organic (E)-3-(5-(4-(bis(2',4'-dibutoxy-[1,1'-biphenyl]-4-yl) amino) phenyl) thiophen-2-yl)-2-cyanoacrylic acid (D35) dye is reported. The D35 molecule is chemically adsorbed via a bidentate anchor group upon the TiO 2 underlayer. This enhances the power conversion efficiency of PSCs due to its well-established versatile role, offering facilitation of electron charge transfer to the anode while favoring the growth of robust and homogenous perovskite layers. However, its influence in the PSC performance seems to expand further. The stability experiments showed an enhanced endurance for the devices after the insertion of D35, not only in shelf-shield conditions but also after accelerated thermal tests and prolonged light exposure. This study confirms the plethoric role of dye sensitization strategy and its advantages to interfacial engineering via organic chromophores towards efficient and stable PSCs.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dye Engineered Perovskite Solar Cells under Accelerated Thermal Stress and Prolonged Light Exposure

et al. 2020

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“…The modified PSCs presented improved thermal stability and maintained 80% of the initial PCE after 50 days in ambient air. [231] On the whole, the 2D perovskite barriers present high hydrophobicity to shield moisture, passivated perovskite surface to suppress ion diffusion, and increased formation energy to restrict the heat stress, leading to significantly improved stability. In the future, researchers should balance the stability and conductivity/charge transfer to improve the efficiency and stability at the same time.…”

Section: Perovskite Barriersmentioning

confidence: 99%

Barrier Designs in Perovskite Solar Cells for Long‐Term Stability

Zhang

Liu

Zhang

et al. 2020

Advanced Energy Materials

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Perovskite solar cells (PSCs) have attracted much attention in the past decade and their power conversion efficiency has been rapidly increasing to 25.2%, which is comparable with commercialized solar cells. Currently, the long‐term stability of PSCs remains as a major bottleneck impeding their future commercial applications. Beyond strengthening the perovskite layer itself and developing robust external device encapsulation/packaging technology, integration of effective barriers into PSCs has been recognized to be of equal importance to improve the whole device’s long‐term stability. These barriers can not only shield the critical perovskite layer and other functional layers from external detrimental factors such as heat, light, and H2O/O2, but also prevent the undesired ion/molecular diffusion/volatilization from perovskite. In addition, some delicate barrier designs can simultaneously improve the efficiency and stability. In this review article, the research progress on barrier designs in PSCs for improving their long‐term stability is reviewed in terms of the barrier functions, locations in PSCs, and material characteristics. Regarding specific barriers, their preparation methods, chemical/photoelectronic/mechanical properties, and their role in device stability, are further discussed. On the basis of these accumulative efforts, predictions for the further development of effective barriers in PSCs are provided at the end of this review.

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“…Previous studies revealed that the degradation of PSCs is mainly caused by corrosive moisture, heat, and UV illumination [9][10][11]. Strategies including additive engineering [12], interfacial modification engineering [13][14][15], and encapsulation can prolong the device lifetime by isolating these external environmental factors [16,17].…”

Section: Introductionmentioning

confidence: 99%

Enhanced efficiency and thermal stability of perovskite solar cells using poly(9-vinylcarbazole) modified perovskite/PCBM interface

Cited by 29 publications

References 52 publications

Dye Engineered Perovskite Solar Cells under Accelerated Thermal Stress and Prolonged Light Exposure

Dye Engineered Perovskite Solar Cells under Accelerated Thermal Stress and Prolonged Light Exposure

Barrier Designs in Perovskite Solar Cells for Long‐Term Stability

Multifunctional dopamine-assisted preparation of efficient and stable perovskite solar cells

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