Green Solvent-Based Perovskite Precursor Development for Ink-Jet Printed Flexible Solar Cells

Wilk, Barbara; Öz, Senol; Radicchi, Eros; Ünlü, Feray; Ahmad, Taimoor; Herman, Artur P.; Nunzi, Francesca; Mathur, Sanjay; Kudrawiec, R.; Wojciechowski, Konrad

doi:10.1021/acssuschemeng.0c09208

Cited by 30 publications

(23 citation statements)

References 61 publications

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“…Wojciechowski et al used thiosemicarbazide and acid additive to regulate the crystallization process of perovskites in low-toxic solvents, and they obtained highquality perovskite films on PET substrate by inkjet printing. [179] Antisolvents for accelerating heterogeneous nucleation are usually toxic. The toxicity of solvents will restrict commercial application of flexible devices.…”

Section: Green Solventsmentioning

confidence: 99%

Flexible and Wearable Optoelectronic Devices Based on Perovskites

Zhao

et al. 2021

Adv Materials Technologies

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PCE) values than the single-junction solar cells. [11,12] In addition, perovskites have shown emerging applications in lightemitting diodes (LEDs), photodetectors and other fields. These devices are fabricated on the rigid substrate initially, which limit their applications in the emerging intelligent devices, such as flexible display and intelligent sensor. [13,14] Flexible devices with stretchability and crumpling durability are capable of realizing portable and wearable application. Kumar et al. reported the first flexible-perovskite solar cells (F-PSCs) with PCE of 2.6%. [15] With the optimization of devices and deep understanding of perovskite materials, the highest PCE of F-PSCs is more than 20%. [16] The artemisinin passivation strategy was used to reduce the trap density through the interaction between artemisinin and the uncoordinated Pb 2+ . The PCE of flexible devices is often limited by their low-temperature manufacturing process. Generally, perovskite optoelectronic devices can be prepared by solution method. [9,10] So far, the flexible devices have been reported by various methods, such as vapor deposition, [17] inkjet printing, [18][19][20] slot-die coating. [21][22][23] These fabrication methods with low-cost and simplicity are suitable for large-scale fabrication of flexible devices. The flexibility of optoelectronic devices is influenced by many aspects, such as the substrates, carrier transport layers, photoactive layers, and electrodes in the structure of F-PSCs. Different from the rigid devices, flexible devices are commonly fabricated on substrate with flexibility, such as polyethylene terephthalate (PET), polyethylene 2,6-naphthalate (PEN), polyimide (PI), [24][25][26] metal foil. [27,28] For substrate of F-PSCs, metal foil has excellent conductivity, flexibility, and thermal stability, but its low light transmittance could limit its application in optoelectronic devices. [29] Indium tin oxide (ITO) is commonly used as electrode material because of its excellent light transmittance and low electrical resistance, [30] while the brittleness limits its application. [31] The metal mesh electrode is a substitute for the flexible electrode with high conductivity and excellent transmittance. [32] The electron transport layer (ETL) is also important component of F-PSCs. TiO 2 is a widely used ETL in perovskite devices because of its suitable energy band position. [33] However, the low heat resistance of PEN and PET polymer substrates limits the processing temperature of TiO 2 in the preparation process. [34] Hence, many low temperature preparation methods about TiO 2 and new ETL materials have been developed. [34,35] Ethoxylated-polyethylenimine is often used for ETL in flexible devices because it is flexible and can improve electronic transport performance. [36] Another Perovskites as promising photovoltaic materials have been widely investigated due to their excellent photoelectric properties. Perovskite optoelectronic devices have been applied in fields of portable energy, light monitors, image ...

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Section: Green Solventsmentioning

confidence: 99%

Flexible and Wearable Optoelectronic Devices Based on Perovskites

Zhao

et al. 2021

Adv Materials Technologies

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“…For example, while some studies show the disaggregation of large colloids/aggregates leads to improved device performance, 18 , 19 , 21 others show an optimum amount of large colloids results in the formation of a more stable precursor. 16 In contrast, some studies using DLS were not able to measure particles >10 nm, 20 and a study by Dutta et al 22 examining perovskite colloids using cryo-electron microscopy of MAPbI 3 solutions found the dominant species to be small colloids. Consequently, it is reasonable to ask exactly what DLS is measuring in these solutions.…”

Section: Introductionmentioning

confidence: 98%

Exploring Nanoscale Structure in Perovskite Precursor Solutions Using Neutron and Light Scattering

et al. 2022

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Tailoring the solution chemistry of metal halide perovskites requires a detailed understanding of precursor aggregation and coordination. In this work, we use various scattering techniques, including dynamic light scattering (DLS), small angle neutron scattering (SANS), and spin–echo SANS (SESANS) to probe the nanostructures from 1 nm to 10 μm within two different lead-halide perovskite solution inks (MAPbI 3 and a triple-cation mixed-halide perovskite). We find that DLS can misrepresent the size distribution of the colloidal dispersion and use SANS/SESANS to confirm that these perovskite solutions are mostly comprised of 1–2 nm-sized particles. We further conclude that if there are larger colloids present, their concentration must be <0.005% of the total dispersion volume. With SANS, we apply a simple fitting model for two component microemulsions (Teubner–Strey), demonstrating this as a potential method to investigate the structure, chemical composition, and colloidal stability of perovskite solutions, and we here show that MAPbI 3 solutions age more drastically than triple cation solutions.

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“…Perovskite solar cells (PSCs) are attractive candidates for next-generation photovoltaic technology due to their remarkable efficiencies and low-cost fabrication process. 1 PSCs has achieved a certified power conversion efficiency (PCE) record of 25.5%, that is attributed to outstanding properties of perovskite semiconductors, such as high defects tolerance, low exciton binding energy, long diffusion length, strong optical absorption, and ambipolar charge transport. [2][3][4][5][6][7] By means of low-temperature solution process, perovskite films with low trap density and high crystallinity can be obtained owing to the low activation barrier for crystallization.…”

Section: Introductionmentioning

confidence: 99%