Growth and Characterization of PDMS-Stamped Halide Perovskite Single Microcrystals

Khoram, Parisa; Brittman, Sarah; Dzik, Wojciech I.; Reek, Joost N. H.; Garnett, Erik C.

doi:10.1021/acs.jpcc.6b02011

Cited by 29 publications

(21 citation statements)

References 38 publications

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“…With symmetric back-contact, such a device shows no obvious photovoltaic characteristics, demonstrating the importance of the nonsymmetric Schottky junction. The work function difference of the two contacts can be realized either by adopting different metals [126] or by surface polarity modification of metal electrode. [36] The device gives a V oc of 0.55 V (Figure 7j) and a highest performing bc-PSC showed a PCE of 3.11%.…”

Section: Lateral Structurementioning

confidence: 99%

“…Khoram et al reported a microscopic PSC based on single microcrystals perovskite grown on prefabricated grating electrodes with nonsymmetric work functions (Figure 7a,b) creating single-crystal devices contacted from the back (bc-PSC, Figure 7c-f). [126] Such a microscale PSC with high (Pd) and low (Ti) work function metals as carrier-selective contacts gives a high V oc of 1.07 V (Figure 7g). With symmetric back-contact, such a device shows no obvious photovoltaic characteristics, demonstrating the importance of the nonsymmetric Schottky junction.…”

Section: Lateral Structurementioning

confidence: 99%

“…For such double Schottky junction solar cells, the built-in potential originated from the different work function of the two contacts is crucial for charge extraction. The work function difference of the two contacts can be realized either by adopting different metals [126] or by surface polarity modification of metal electrode. [36] Inserting interdigitated back-contact electrodes into PSCs overcomes the optical losses by eliminating the need for transparent electrodes and low architectural defect tolerance present Adv.…”

Section: Lateral Structurementioning

confidence: 99%

Section: Lateral Structurementioning

confidence: 99%

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Simple, Robust, and Going More Efficient: Recent Advance on Electron Transport Layer‐Free Perovskite Solar Cells

Huang

2019

Advanced Energy Materials

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Perovskite solar cells (PSCs) have shown great potential for photovoltaic applications with their unprecedented power conversion efficiency advancement. Such devices generally have a complex structure design with high temperature processed TiO2 as the electron transport layer (ETL). Further careful design of device configuration to fully tap the potentials of perovskite materials is expected. Particularly, for the practical application of PSCs, it is crucial to simplify their device structures thus the associated manufacturing process and cost while maintaining their efficiency to be comparable with the conventional devices. But how simple is simple? ETL‐free PSCs promise the simplest structured, thus simple manufacturing processes and low cost large area PSCs in practical applications. They can also help the further exploration of the great potential of perovskite materials and understanding the working principle of PSCs. Within this review, the evolution of the PSC is outlined by discussing the recent advances in the simplification of device configuration and processes for cost effective, highly efficient, and robust PSCs, with a focus on ETL‐free PSCs. Their advancement, key issues, working mechanism, existing problems, and future performance enhancements. This review aims to promote the future development of low cost and robust ETL‐free PSCs toward more efficient power output.

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Section: Lateral Structurementioning

confidence: 99%

Section: Lateral Structurementioning

confidence: 99%

Section: Lateral Structurementioning

confidence: 99%

Section: Lateral Structurementioning

confidence: 99%

See 2 more Smart Citations

Simple, Robust, and Going More Efficient: Recent Advance on Electron Transport Layer‐Free Perovskite Solar Cells

Huang

2019

Advanced Energy Materials

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“…The photovoltaic properties of CTL-free PSCs, in which metals or graphene directly contact the perovskite to create Schottky junction solar cells [9][10][11][12][13][14] , depend strongly on the built-in potential established by the work function difference of the two contacts ( Fig. 1a).…”

Section: Introductionmentioning

confidence: 99%

Dipole-field-assisted charge extraction in metal-perovskite-metal back-contact solar cells

Lin

2017

Proceedings of the 2nd Asia-Pacific Hybrid and Organic Photovoltaics

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Hybrid organic-inorganic halide perovskites are low-cost solution-processable solar cell materials with photovoltaic properties that rival those of crystalline silicon. The perovskite films are typically sandwiched between thin layers of hole and electron transport materials, which efficiently extract photogenerated charges. This affords high-energy conversion efficiencies but results in significant performance and fabrication challenges. Herein we present a simple charge transport layer-free perovskite solar cell, comprising only a perovskite layer with two interdigitated gold back-contacts. Charge extraction is achieved via self-assembled monolayers and their associated dipole fields at the metal-perovskite interface. Photovoltages of~600 mV generated by self-assembled molecular monolayer modified perovskite solar cells are equivalent to the built-in potential generated by individual dipole layers. Efficient charge extraction results in photocurrents of up to 12.1 mA cm −2 under simulated sunlight, despite a large electrode spacing.

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The Relationship between Chemical Flexibility and Nanoscale Charge Collection in Hybrid Halide Perovskites

Luo

Aharon

Stückelberger

et al. 2018

Adv Funct Materials

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Hybrid organometal halide perovskites are known for their excellent optoelectronic functionality as well as their wide-ranging chemical flexibility. The composition of hybrid perovskite devices has trended toward increasing complexity as fine-tuned properties are pursued, including multielement mixing on the constituents A and B and halide sites. However, this tunability presents potential challenges for charge extraction in functional devices. Poor consistency and repeatability between devices may arise due to variations in composition and microstructure. Within a single device, spatial heterogeneity in composition and phase segregation may limit the device from achieving its performance potential. This review details how the nanoscale elemental distribution and charge collection in hybrid perovskite materials evolve as chemical complexity increases, highlighting recent results using nondestructive operando synchrotron-based X-ray nanoprobe techniques. The results reveal a strong link between local chemistry and charge collection that must be controlled to develop robust, high-performance hybrid perovskite materials for optoelectronic devices.applications including solar cells, [1,2] lightemitting diodes, [3] lasers, [4] and photodetectors. [5] The exceptional minority carrier diffusion lengths in these materials [6,7] lead to nearly 100% internal quantum efficiency [8] which results in high charge-carrier collection efficiency and high external luminescence efficiency in electron-photon conversion devices. [9] Particularly in the field of photovoltaics (PV), their extraordinary material properties [10][11][12] have enabled perovskite solar absorbers to achieve large improvements in device performance in the past 8 years. The perovskite crystal structure is shown in Figure 1a, where the A-site is CH 3 NH 3 + (MA, methylammonium), the B-site is Pb 2+ , and the X-site is I − following the general perovskite formula ABX 3. After demonstration of a device with 3.8% power conversion efficiency (PCE) by Miyasaka and co-workers in a dye-sensitized solar cell architecture using CH 3 NH 3 PbI 3 , [13] a breakthrough in perovskite photovoltaics occurred in 2012 when the first allsolid-state hybrid perovskite devices were shown by Kim et al., [14] improving the chemical stability of the perovskite and enabling device performance to exceed beyond 9% using CH 3 NH 3 PbI 3 perovskites. With intense investigation of perovskite material properties from research groups all over the world, including bandgap engineering by halide mixing [15,16] and device optimization using A-site mixing, [9,17] the record PCE of hybrid perovskite solar cells reached 22.7% in 2017 after achieving 22.1% PCE in 2015 [18] using a mixture of formamidinium lead iodide (CH(NH 2 ) 2 PbI 3 ) with 5% loading of methylammonium lead bromide (CH 3 NH 3 PbBr 3 ) chemistry. [19,20] Surpassing 22% PCE by leveraging the chemical flexibility of the perovskite structure brought hybrid perovskite solar cells on par in efficiency with most polycrystalline solar absor...

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Growth and Characterization of PDMS-Stamped Halide Perovskite Single Microcrystals

Cited by 29 publications

References 38 publications

Simple, Robust, and Going More Efficient: Recent Advance on Electron Transport Layer‐Free Perovskite Solar Cells

Simple, Robust, and Going More Efficient: Recent Advance on Electron Transport Layer‐Free Perovskite Solar Cells

Dipole-field-assisted charge extraction in metal-perovskite-metal back-contact solar cells

The Relationship between Chemical Flexibility and Nanoscale Charge Collection in Hybrid Halide Perovskites

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