Controlled orientation of perovskite films through mixed cations toward high performance perovskite solar cells

Niu, Guangda; Yu, Hongde; Li, Jiangwei; Wang, Dong

doi:10.1016/j.nanoen.2016.06.053

Cited by 124 publications

(92 citation statements)

References 31 publications

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“…We acknowledge that inverted structure generally produces al ower PCE compared to am esoporous TiO 2 -based device, whereas the former offers as traightforward test bed to investigate the effect of PMMA on the cathode interface properties in perovskite devices.A sabackground study,w ec ompared thin-film absorbance of CH 3 NH 3 PbI 3Àx Cl x /PC 61 BM incorporated with various PMMA (see Figure1c). Clearly,t here are no substantial changes in the presence of PMMA,i ndicating that the optical properties are nearly unaffected, [24] at least in the bulk of CH 3 NH 3 PbI 3-x Cl x films. Then we examined the PMMA concentration dependence for device performance.…”

Section: Resultsmentioning

confidence: 85%

Incorporating an Inert Polymer into the Interlayer Passivates Surface Defects in Methylammonium Lead Halide Perovskite Solar Cells

Zhang

Qin

et al. 2017

Chemistry A European J

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The hysteresis effect and instability are important concerns in hybrid perovskite photovoltaic devices that hold great promise in energy conversion applications. In this study, we show that the power conversion efficiency (PCE), hysteresis, and device lifetime can be simultaneously improved for methylammoniumlead halide (CH NH PbI Cl ) solar cells after incorporating poly(methyl methacrylate) (PMMA) into the PC BM electron extraction layer (EEL). By choosing appropriate molecular weights of PMMA, we obtain a 30 % enhancement of PCE along with effectively lowered hysteresis and device degradation, adopting inverted planar device structure. Through the combinatorial study using Kelvin probe force microscopy, diode mobility measurements, and irradiation-dependent solar cell characterization, we attribute the enhanced device parameters (fill factor and open circuit voltage) to the surface passivation of CH NH PbI Cl , leading to mitigating charge trapping at the cathode interface and resultant Shockley-Read-Hall charge recombination. Beneficially, modified by inert PMMA, CH NH PbI Cl solar cells display a pronounced retardation in performance degradation, resulting from improved film quality in the PC BM layer incorporating PMMA which increases the protection for underneath perovskite films. This work enables a versatile and effective interface approach to deal with essential concerns for solution-processed perovskite solar cells by air-stable and widely accessible materials.

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Section: Resultsmentioning

confidence: 85%

Incorporating an Inert Polymer into the Interlayer Passivates Surface Defects in Methylammonium Lead Halide Perovskite Solar Cells

Zhang

Qin

et al. 2017

Chemistry A European J

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“…As an emerging photovoltaic material, organolead halide perovskites in PSCs have demonstrated many superiorities over the traditional ones, e.g., tunable band-gap, ultralong carrier diffusion length, as well as good solution processibility that is highly desired for future cost-effective and facile fabrication [1][2][3][4]. PSCs exhibit high flexibility in cell architectures and the ones that contain mesoporous scaffolds are usually classified to be mesoscopic PSCs (M-PSCs) which are extraordinarily representative and reliable in terms of achieving high photoelectric conversion efficiencies (PCEs) [5,6]. In recent years, no efforts have been spared to promoting the device performance of M-PSCs and a stabilized PCE of 22.1% has been achieved recently [7].…”

Section: Introductionmentioning

confidence: 99%

Rational design of SnO2-based electron transport layer in mesoscopic perovskite solar cells: more kinetically favorable than traditional double-layer architecture

et al. 2017

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Here, the interfacial synergism of discontinuous spot shaped SnO 2 and TiO 2 mesoporous nanocomposite as electron transfer layer (ETL) underlayer is presented in highly efficient mesoscopic perovskite solar cells (M-PSCs). Based on this new strategy, strong charge recombination observed in previous SnO 2 -based ETLs is suppressed to a great extent as the pathways of charge recombination and energy loss are blocked effectively. Meanwhile, the internal series resistance of entire M-PSC is decreased remarkably. The new ETL is more kinetically favorable to electron transfer and thus results in significant photovoltaic improvement and alleviated hysteresis effect of M-PSCs.

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“…

(I) The first is the stability challenge.

…”

mentioning

confidence: 99%

Combination of Hybrid CVD and Cation Exchange for Upscaling Cs‐Substituted Mixed Cation Perovskite Solar Cells with High Efficiency and Stability

Jiang

Leyden

Qiu

et al. 2017

Adv Funct Materials

173

178

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Mixed cation hybrid perovskites such as Cs [16][17][18] and adjusting the composition of perovskite films, [19][20][21][22] research efforts are also urgently needed to increase the scalability of research findings obtained in research labs and make this technology amenable for industry. There are two main challenges we are still facing.(I) The first is the stability challenge. At present stability of PSCs is still poorer than inorganic semiconductor based solar cells, foe example, crystalline silicon solar cells and thin film copper indium gallium selenide (CIGS) solar cells. [10,[23][24][25] To overcome the instability issue, external protections (e.g., perovskite surface functionalization, [26] utilization of chemically inert electron transport materials, hole transport materials and top electrode, deposition of additional protection layer, etc.) have been attempted. [27][28][29] Stability of the perovskite layer itself is Large-Area Perovskite Solar Modules

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Controlled orientation of perovskite films through mixed cations toward high performance perovskite solar cells

Cited by 124 publications

References 31 publications

Incorporating an Inert Polymer into the Interlayer Passivates Surface Defects in Methylammonium Lead Halide Perovskite Solar Cells

Incorporating an Inert Polymer into the Interlayer Passivates Surface Defects in Methylammonium Lead Halide Perovskite Solar Cells

Rational design of SnO2-based electron transport layer in mesoscopic perovskite solar cells: more kinetically favorable than traditional double-layer architecture

Combination of Hybrid CVD and Cation Exchange for Upscaling Cs‐Substituted Mixed Cation Perovskite Solar Cells with High Efficiency and Stability

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