Easily accessible polymer additives for tuning the crystal-growth of perovskite thin-films for highly efficient solar cells

Dong, Qingqing; Wang, Zhaowei; Zhang, Kaicheng; Yu, Hao; Huang, Peng; Liu, Xiaodong; Zhou, Yi; Chen, Ning; Song, Bo

doi:10.1039/c6nr00206d

Cited by 83 publications

(52 citation statements)

References 50 publications

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“…Furthermore, to investigate the crystallinity of the CH 3 NH 3 PbI 3−x Cl x film, X-ray diffraction (XRD) spectrum of the perovskite film synthesized on a glass substrate chalk up. Figure 1d presents the XRD spectrum, and four characteristic peaks centered at 14.2°, 28.6°, 31.02°, and 43.38°are assigned to the (110), (220), (310), and (330) planes, respectively, indicating that the halide perovskite films possess the expected orthorhombic crystal structure with high crystallinity, which is consistent with the reported literature [34][35][36][37][38].…”

Section: Resultssupporting

confidence: 86%

All-Perovskite Photodetector with Fast Response

et al. 2019

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Perovskites have attracted substantial attention on account of their excellent physical properties and simple preparation process. Here we demonstrated an improved photodetector based on solution-processing organic-inorganic hybrid perovskite CH 3 NH 3 PbI 3− x Cl x layer decorated with CsPbBr 3 perovskite quantum dots. The CH 3 NH 3 PbI 3− x Cl x -CsPbBr 3 photodetector was operated in a visible light region, which appeared high responsivity ( R = 0.39 A/W), detectivity ( D* = 5.43 × 10 9 Jones), carrier mobility ( μ p = 172 cm 2 V −1 s −1 and μ n = 216 cm 2 V −1 s −1 ), and fast response (rise time 121 μs and fall time 107 μs). The CH 3 NH 3 PbI 3− x Cl x -CsPbBr 3 heterostructure is anticipated to find comprehensive applications in future high-performance photoelectronic devices. Electronic supplementary material The online version of this article (10.1186/s11671-019-3082-z) contains supplementary material, which is available to authorized users.

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Section: Resultssupporting

confidence: 86%

All-Perovskite Photodetector with Fast Response

et al. 2019

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“…[22][23][24][25][26][27][28] As a result, various methods were developed to improve these qualities of perovskite thin lm, for example interfacial engineering, solvent engineering, additive-assisted preparation, etc. [29][30][31][32][33][34] Doping of semiconductors, a process of intentional inserting impurities into an extremely pure crystal, is a key approach to manipulate optical and electrical properties of device. [35][36][37][38][39] In general, new energy states within the band gap are introduced by doping, so as to facilitate the occurrence of low-energy electronic transitions.…”

Section: Introductionmentioning

confidence: 99%

CH₃NH₃Pb_1−xEu_xI₃ mixed halide perovskite for hybrid solar cells: the impact of divalent europium doping on efficiency and stability

Wang

et al. 2018

RSC Adv.

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The crucial role of the impact of divalent europium doping in perovskite solar cells is investigated in this work. We selected europium (Eu 2+ , 117 pm) to replace lead (Pb 2+ , 119 pm) because their ion radii are really comparable. This appropriate substitution has shown great potential to achieve high stability and enhance the power conversion efficiency of the solar cells. Through adjusting the doping concentration of europium, the perovskite solar cells corresponding average efficiency greatly increased. Furthermore, compared with the CH 3 NH 3 PbI 3 perovskite film, the attenuation of power conversion efficiency of europium doped perovskite film slowed down 4.7 times at room temperature. Therefore, we put forward a useful method for the optimization of organic-inorganic perovskite solar cells.

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“…Likewise, the preparation of 2D perovskites by the insertion of larger cations, for example, ethylammonium (EA + ), C 6 H 5 (CH 2 ) 2 NH 3 + (PEA + ),, and alkylammonium ion CH 3 (CH 2 ) 3 NH 3 + (BA + ) fluorinated 1,1,1‐trifluoroethyl ammonium iodide (FEAI) FEA +[36] into the 3D MAPbI 3 lattice could also improve stability compared to that of the 3D MAPbI 3 analogues, making them more attractive for large‐scale industrial implementation. Similarly, polyethylenimine (PEI), an amorphous polymer with excellent stability, water resistance and chemical resistance, has been used to improve the stability of perovskite films …”

Section: Introductionmentioning

confidence: 99%

Highly Stable Hybrid Perovskite Solar Cells Modified with Polyethylenimine via Ionic Bonding

et al. 2018

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Organic-inorganic hybrid perovskites are highly promising materials for photovoltaic applications, yet their rapid degradation remains a significant challenge. Here, three highly stable methylammonium lead iodide (MAPbI 3 ) perovskite films modified with polyethylenimines (PEIs) of different molecular weights (Mw = 600, Mw = 10000 and Mw = 70000) were successfully obtained. The PEIs were used as an additive in the perovskite to determine their influences on the structure, film quality, and performance of the perovskite. The perovskite films modified with PEIs showed excellent stability, when studied over 20 days under ambient air conditions with a medial humidity of 60%. The results of XRD, UV-Vis absorption and fluorescence lifetime measurements showed that the PEI could not substitute for MA within the perovskite crystal lattice. The solar power conversion efficiency (PCE) h of the pristine perovskite film and those modified with PEI (Mw = 600), PEI (Mw = 10000) and PEI (Mw = 70000) were 9.69%, 6.84%, 6.43% and 6.94%, respectively. Even though the PCE is lower for the PEI-modified solar cells, their stability is substantially improved. The improved stability is attributed to PEI-H + cations in the grain boundary of the perovskites, preventing them from direct contact with water molecules that otherwise cause fast degradation. This demonstrates that PEI modification is a simple and powerful strategy for stabilizing perovskite films.[a] Dr.

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Easily accessible polymer additives for tuning the crystal-growth of perovskite thin-films for highly efficient solar cells

Cited by 83 publications

References 50 publications

All-Perovskite Photodetector with Fast Response

All-Perovskite Photodetector with Fast Response

CH₃NH₃Pb_1−xEu_xI₃ mixed halide perovskite for hybrid solar cells: the impact of divalent europium doping on efficiency and stability

Highly Stable Hybrid Perovskite Solar Cells Modified with Polyethylenimine via Ionic Bonding

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Easily accessible polymer additives for tuning the crystal-growth of perovskite thin-films for highly efficient solar cells

Cited by 83 publications

References 50 publications

All-Perovskite Photodetector with Fast Response

All-Perovskite Photodetector with Fast Response

CH3NH3Pb1−xEuxI3 mixed halide perovskite for hybrid solar cells: the impact of divalent europium doping on efficiency and stability

Highly Stable Hybrid Perovskite Solar Cells Modified with Polyethylenimine via Ionic Bonding

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CH₃NH₃Pb_1−xEu_xI₃ mixed halide perovskite for hybrid solar cells: the impact of divalent europium doping on efficiency and stability