Highly Efficient Flexible Perovskite Solar Cells with Antireflection and Self-Cleaning Nanostructures

Tavakoli, Mohammad Mahdi; Tsui, Kwong-Hoi; Zhang, Qianpeng; He, Jin‐Sheng; Yao, Yan; Li, Dongdong; Fan, Zhiyong

doi:10.1021/acsnano.5b04284

Cited by 343 publications

(284 citation statements)

References 41 publications

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“…With a nanocone array antirefl ection fi lm deposited on the front side of a glass substrate, the optical transmittance and the water repellence were improved, resulting in a champion PCE of 13.14%. [ 63 ] …”

Section: Research Newsmentioning

confidence: 99%

High‐Efficiency Flexible Solar Cells Based on Organometal Halide Perovskites

et al. 2015

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Flexible and light-weight solar cells are important because they not only supply power to wearable and portable devices, but also reduce the transportation and installation cost of solar panels. High-efficiency organometal halide perovskite solar cells can be fabricated by a low-temperature solution process, and hence are promising for flexible-solar-cell applications. Here, the development of perovskite solar cells is briefly discussed, followed by the merits of organometal halide perovskites as promising candidates as high-efficiency, flexible, and light-weight photovoltaic materials. Afterward, recent developments of flexible solar cells based on perovskites are reviewed.

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Section: Research Newsmentioning

confidence: 99%

High‐Efficiency Flexible Solar Cells Based on Organometal Halide Perovskites

et al. 2015

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“…For example, light management schemes such as antirefl ection coatings, back-refl ectors, and surface texturing were explored in order to reduce the optical losses from the devices. [1][2][3][4][5][6][7][8][9][10][11] In particular, the utilization of nanostructures is considered a promising approach to improve the optical absorption as well as the PCE of solar energy harvesting devices. With regard to this, various nanostructures including nanospike (NSP), nanowire (NW)/ nanopillar (NPL) and nanocone (NC) have been explored, and they have demonstrated promising potency to improve the optical absorption and PCE of solar energy harvesting devices as opposed to their planar counterpart.…”

Section: Introductionmentioning

confidence: 99%

Progress and Design Concerns of Nanostructured Solar Energy Harvesting Devices

Leung

Zhang

Tavakoli

et al. 2016

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Integrating devices with nanostructures is considered a promising strategy to improve the performance of solar energy harvesting devices such as photovoltaic (PV) devices and photo-electrochemical (PEC) solar water splitting devices. Extensive efforts have been exerted to improve the power conversion efficiencies (PCE) of such devices by utilizing novel nanostructures to revolutionize device structural designs. The thicknesses of light absorber and material consumption can be substantially reduced because of light trapping with nanostructures. Meanwhile, the utilization of nanostructures can also result in more effective carrier collection by shortening the photogenerated carrier collection path length. Nevertheless, performance optimization of nanostructured solar energy harvesting devices requires a rational design of various aspects of the nanostructures, such as their shape, aspect ratio, periodicity, etc. Without this, the utilization of nanostructures can lead to compromised device performance as the incorporation of these structures can result in defects and additional carrier recombination. The design guidelines of solar energy harvesting devices are summarized, including thin film non-uniformity on nanostructures, surface recombination, parasitic absorption, and the importance of uniform distribution of photo-generated carriers. A systematic view of the design concerns will assist better understanding of device physics and benefit the fabrication of high performance devices in the future.

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“…The device performance was improved from 12.06% to 13.14% by adding this nanocone AR film, which had a water contact angle of up to 155°. [147] For all of these studies, no V OC or fill factor losses were observed. [46,120,[148][149][150] …”

Section: Nanostructure Layers On the Solar Device Exteriormentioning

confidence: 85%

Toward Highly Efficient Nanostructured Solar Cells Using Concurrent Electrical and Optical Design

Wang

2017

Advanced Energy Materials

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For example, the multiple exciton generation (MEG) effect, observed in quantum dots (QDs), could have the potential to boost the Shockley-Queisser efficiency limit from 33.7% to 44.0%. [4,5] Nanostructured absorbers, featuring subwavelength features, can achieve an absorption enhancement factor higher than the conventional ray-optic limit across a broadband range of wavelengths, which opens an entirely new way of designing highly efficient nanostructured solar cells. [6,7] Meanwhile, the utilization of nanostructures can improve carrier collection by promoting the separation of photogenerated carriers and shortening the diffusion length of charge carriers using core-shell architectures. [8] However, despite the advantages of nanostructures, at present the efficiency of these solar cells remains lower than that of first-and second-generation devices. Compared with commercially available Si wafer photovoltaics, whose energy conversion efficiency can reach 25.6%, the record energy conversion efficiency of a nanostructured Si solar cell is only 22.1%, which is still far from the Shockley-Queisser efficiency limit of 32.0%. [9,10] This limited performance is due to the fact that most nanostructures bring accompanying optical or electrical losses to solar cells (Figure 1). [11][12][13][14][15] In fact, most nano-based solar cells have relatively low open-circuit voltages (V OC ) and a disproportionate enhancement of the short-circuit current density (J SC ) compared to the absorption enhancement via light-trapping nanostructures. Therefore, in order to avoid the counterbalance of optical and electrical gains by the accompanying losses associated with nanomaterials, it is necessary to look beyond singularly focused optical or electrical promotion schemes, and instead shift toward the concurrent design of electrical and optical properties using a combined perspective to achieve highly efficient nanostructured solar cells.Thus far, many excellent reviews have summarized different photon management or light-harvesting schemes with the use of nanostructures. [16][17][18][19][20][21][22][23][24] These authors point out that important work remains to ensure that improved optical absorption does not come at the sacrifice of the device's electrical properties. [16,17,[19][20][21][22][23][24] However, there have been few reviews that propose a solution for how to overcome this challenge. Recently, there has been considerable effort to increase both light absorption and the photogenerated carrier collection Recent technological advances in conventional planar and microstructured solar cell architectures have significantly boosted the efficiencies of these devices near the corresponding theoretical values. Nanomaterials and nano structures have promising potential to push the theoretical limits of solar cell efficiency even higher using the intrinsic advantages associated with these materials, including efficient photon management, rapid charge transfer, and short charge collection distances. However, at present the efficiency of...

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Highly Efficient Flexible Perovskite Solar Cells with Antireflection and Self-Cleaning Nanostructures

Cited by 343 publications

References 41 publications

High‐Efficiency Flexible Solar Cells Based on Organometal Halide Perovskites

High‐Efficiency Flexible Solar Cells Based on Organometal Halide Perovskites

Progress and Design Concerns of Nanostructured Solar Energy Harvesting Devices

Toward Highly Efficient Nanostructured Solar Cells Using Concurrent Electrical and Optical Design

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