Perovskite Grains Embraced in a Soft Fullerene Network Make Highly Efficient Flexible Solar Cells with Superior Mechanical Stability

Li, Meng; Yang, Yingguo; Wang, Zhao Kui; Kang, Tin; Wang, Qiong; Turren‐Cruz, Silver‐Hamill; Gao, Xing; Hsu, Chain‐Shu; Liao, Liang; Abate, Antonio

doi:10.1002/adma.201901519

Cited by 130 publications

(148 citation statements)

References 42 publications

Supporting

Mentioning

147

Contrasting

Order By: Relevance

“…[9][10][11][12] For mixed cation/halide perovskites, despite good optoelectronic properties, the mixing of multiple cations and halogens is prone to localized ionic enrichment during preparation, annealing, and operation. By introducing mixed cations and halide to adjust the composition of the organicinorganic hybrid perovskite, the crystal structure of the perovskite can be effectively improved, which ultimately led to the increased stability and efficiency of the PSCs.…”

mentioning

confidence: 99%

Ultrathin Nanosheets of Oxo‐functionalized Graphene Inhibit the Ion Migration in Perovskite Solar Cells

Zuo

Qiong

et al. 2019

Advanced Energy Materials

Self Cite

View full text Add to dashboard Cite

Recent progress of PSCs in efficiency and stability enhancement is addressed to the change of perovskite composition and crystal optimization. By introducing mixed cations and halide to adjust the composition of the organicinorganic hybrid perovskite, the crystal structure of the perovskite can be effectively improved, which ultimately led to the increased stability and efficiency of the PSCs. Compared with the single cation/ halide perovskite (methylammonium halide, formamidinium lead halide, and cesium lead halide), the mixed perovskite not only has higher PCE but also has better heat and humid air stability. [9][10][11][12] For mixed cation/halide perovskites, despite good optoelectronic properties, the mixing of multiple cations and halogens is prone to localized ionic enrichment during preparation, annealing, and operation. At the same time, as the cation and halide ions move in the builtin electric field of the device, local positive and negative ion vacancies are formed. These defects will cause significant hysteresis in the device and ultimately affect the performance of the device. [13][14][15][16][17] A series of studies on both experimental and theoretical methods [13,18,19] have been reported. Constraining Mixed cation/halide perovskites have led to a significant increase in the efficiency and stability of perovskite solar cells. However, mobile ionic defects inevitably exacerbate the photoinduced phase segregation and selfdecomposition of the crystal structure. Herein, ultrathin 2D nanosheets of oxo-functionalized graphene/dodecylamine (oxo-G/DA) are used to solve ion migration in cesium (Cs)-formamidinium (FA)-methylammonium (MA) triple-cation-based perovskites. Based on the superconducting carbon skeleton and functional groups that provide lone pairs of electrons on it, the ultrathin 2D network structure can fit tightly on the crystals and wrap them, isolating them, and thus reducing the migration of ions within the built-in electric field of the perovskite film. As evidence of the formation of sharp crystals with different orientation within the perovskite film, moiré fringes are observed in transmission electron microscopy. Thus, a champion device with a power conversion efficiency (PCE) of 21.1% (the efficiency distribution is 18.8 ± 1.7%) and a remarkable fill factor of 81%, with reduced hysteresis and improved long-term stability, is reported. This work provides a simple method for the improvement of the structural stability of perovskite in solar cells.

show abstract

mentioning

confidence: 99%

Ultrathin Nanosheets of Oxo‐functionalized Graphene Inhibit the Ion Migration in Perovskite Solar Cells

Zuo

Qiong

et al. 2019

Advanced Energy Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…As is well known, perovskite has been widely studied and applied in optoelectronics field due to its excellent photoelectric parameters and ferroelectric properties . The distinct merits of PSCs aim to the high efficiency and flexibility in comparison with conventional silicon‐based solar cells . Figure 4 a shows the flexible PSCs based on SDEs with the structure of SDE/highly conductive PEDOT:PSS (PH1000)/poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS)/perovskite (CH 3 NH 3 PbI 3 )/phenyl‐C 61 ‐butyric acid methyl ester (PCBM)/Ag.…”

Section: Resultsmentioning

confidence: 99%

Malleability and Pliability of Silk‐Derived Electrodes for Efficient Deformable Perovskite Solar Cells

Lou

et al. 2020

Advanced Energy Materials

View full text Add to dashboard Cite

For the fabrication of deformable electronic devices, electrodes that are robust against repeated bending, twisting, stretching, folding, reversible plasticizing, and that maintain electrical conductivity, and so on, are required. Malleable and pliable silk‐derived electrodes are fabricated to enable the shape deformation of perovskite solar cells. Moisture‐driven silk‐derived electrodes show reversible plasticization with malleability and pliability, realizing diverse deformation from simple operations (including bending, folding, stretching, etc.) to complicated structures (including flower, bowknot, and paper crane). It is worth noting that the silk‐derived electrodes maintain electrical conductivity (15.8 Ω sq−1) compared to their initial value (15 Ω sq−1) even after suffering from reversible mechanical plasticization of complicated structures. Deformable perovskite solar cells are fabricated with the silk‐derived electrodes and achieve a power conversion efficiency of 10.40%. The devices maintain 92% of the initial efficiency after 1000 bends at a curvature radius of 2.5 mm. The power does not decline at 50% strain and keeps more than 60% of the initial value after stretching for 50 cycles. Malleability and pliability of silk‐derived electrodes benefit the realization of stretchable perovskite solar cells and deformable electronic devices.

show abstract

“…Pristine fullerenes were usually applied to passivate the interface between the TiO 2 and perovskite layer. To date, the PCE record of TiO 2 ‐based FPSCs is 18.1% that was achieved by grain boundary passivation of the photocrosslinked [6,6]‐phenylC61‐butyric oxetane dendron ester (C‐PCBOD) …”

Section: Carrier Transport Layersmentioning

confidence: 99%

Recent Advances of Device Components toward Efficient Flexible Perovskite Solar Cells

2020

View full text Add to dashboard Cite

Flexible solar cells have launched potential applications in diverse areas, such as civil engineering, consumer electronics, electric automobile, and aerospace use. In recent years, perovskite solar cells (PSCs) have been successful with a rocketing power conversion efficiency (PCE) from 3.8% to 25.2% in the last decade. Due to its material flexibility, together with low‐cost and facile fabrication processes, perovskites have certainly been considered as a promising candidate for the next generation of flexible solar cells. So far, the PCE of single‐junction flexible perovskite solar cells (FPSCs) has reached 19.51%, which retains researchers' great enthusiasm for further development and applications of FPSCs. Herein, a brief review of the recent advances in the structural components of FPSCs is presented, including perovskite absorber layers, flexible substrates, transparent bottom electrodes, and charge carrier transport layers. In particular, the focus is on the development of low‐temperature fabrication processes of the aforementioned compositional layer structures. Finally, noticeable achievements and annual milestones are discussed and summarized, and suggestions for further improvement of FPSCs and their ways toward commercialization are presented.

show abstract

Perovskite Grains Embraced in a Soft Fullerene Network Make Highly Efficient Flexible Solar Cells with Superior Mechanical Stability

Cited by 130 publications

References 42 publications

Ultrathin Nanosheets of Oxo‐functionalized Graphene Inhibit the Ion Migration in Perovskite Solar Cells

Ultrathin Nanosheets of Oxo‐functionalized Graphene Inhibit the Ion Migration in Perovskite Solar Cells

Malleability and Pliability of Silk‐Derived Electrodes for Efficient Deformable Perovskite Solar Cells

Recent Advances of Device Components toward Efficient Flexible Perovskite Solar Cells

Contact Info

Product

Resources

About