Antireflective Paraboloidal Microlens Film for Boosting Power Conversion Efficiency of Solar Cells

Fang, Chaolong; Zheng, Jun; Zhang, Yaoju; Li, Yijie; Liu, Siyuan; Wang, Weiji; Jiang, Tao; Zhao, Xuesong; Li, Zhihong

doi:10.1021/acsami.7b19743

Cited by 37 publications

(26 citation statements)

References 50 publications

(69 reference statements)

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“…DSSCs have a low-light absorption coefficient compared with other types of thin-film solar cells, thus requiring a thick photoanode for optimal photon absorption. However, DSSCs have a relatively slow electron diffusivity compared with single-crystal semiconductor-based solar cells, in which a thick photoanode enhances the recombination rate [20][21][22] . This disharmony between photon generation and recombination is considered as the primary issue limiting DSSC efficiency.…”

Section: Resultsmentioning

confidence: 99%

Preparation 8.5%-efficient submodule using 5%-efficient DSSCs via three-dimensional angle array and light-trapping layer

et al. 2020

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Expanding the application area of photovoltaics to urban environments demands high efficiency under lowintensity lighting conditions, as well as omnidirectional light trapping. Dye-sensitized solar cells are of particular interest in this regard, owing to their superior electricity production in dim light; however, an improvement in dyesensitized solar cells efficiency is required for successful implementation. We developed a light-trapping layer within the photoanode of dye-sensitized solar cells and configured these cells into an angled three-dimensional (3D) array creating a submodule to improve efficiency. The light-trapping layer increases the travel distance of the light within the photoanode, thus improving electron generation by the photons of the omnidirectional incident light. The 3D angled array suppresses recombination and internal resistance losses, improving the collection efficiency by increasing the relative cell surface area with respect to the light projection area. Using the proposed configuration, we achieved a dye-sensitized solar cells submodule efficiency of 8.5% using 5%-efficient dyesensitized solar cells with a pot-shaped light-trapping layer and a 60°angled 3D array for the submodule. Considering that there is room for further improvement, our proposed photovoltaics configuration is expected to overcome the current limitations of dye-sensitized solar cells, thus providing promising photovoltaics modules for urban environments.

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Section: Resultsmentioning

confidence: 99%

Preparation 8.5%-efficient submodule using 5%-efficient DSSCs via three-dimensional angle array and light-trapping layer

et al. 2020

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“…Following this phenomenon, moth-eye mimicking structures were fabricated and applied to enhance the photoelectric conversion efficiency of solar cells, the luminous efficiency of light emitting diodes (LED), or visibility of displays. [73][74][75][76] Except moth's eyes, mosquito's eyes can maintain a visual field clear in humid environment due to the nanostructure on the ommatidium. [13] These interesting structures guide researchers to explore constantly.…”

Section: Nanostructures On the Ommatidium Of Compound Eyesmentioning

confidence: 99%

Bioinspired Artificial Compound Eyes: Characteristic, Fabrication, and Application

Yang

Bian

et al. 2021

Adv Materials Technologies

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the visual nerve perception. This type of eyes has ultrahigh resolution, which can get clear image information. Inspired by this imaging system, people have put significant efforts over a long time for development of camera-related optical system for various applications, such as endoscope, digital camera, smartphones, robot eyes, visual implants. [7][8][9][10] Because of the rapid progress in micro/nano technologies, the artificial eyes structures can achieve extremely high resolution that is close to or even exceeding the human eye. However, the low field of view (FOV) (the maximum value is only 90°) hinders its wider applications. To solve this problem, multiple cameras need to be put together to work, which not only increases the cost, but also makes the entire optical system cumbersome. Hence, an optical device with portable, integrated, and large FOV features is highly desired.Different from the single-lens eyes, the insect eyes adopt another visual system. Figure 1b shows a honeybee's apposition compound eye, which has thousands of ommatidia arranged on a curved surface so that each ommatidium points in different directions. [11] Each unit consists of a lens, a crystalline cone, and a rhabdom. The focused light signal is transmitted to the photosensitive area by the crystalline cone, and then visual perception is generated after passing through the rhabdom. Each of the ommatidium can image which enables the insects to obtain sufficient information in a complex environment and exhibits the characteristics of large FOV, low aberration, and high sensitivity to moving objects. [12] In addition to the honeybee's compound eyes, the eyes of other insects in nature, such as mosquito eye, [13] fly's eye, [14] moth's eye, [15] and dragonfly's eye [16] also have similar structure and have attracted much attention due to the deep research on bionics. [4,9,12,[17][18][19][20][21] The characteristics of the compound eyes in nature and the advanced micro/nano-processing technologies provide great technical support and inspiration for the researchers to prepare artificial compound eyes (ACEs) with close-packed microlens arrays (MLAs) as optical imaging elements. [22][23][24][25][26][27][28][29][30] Such MLAs compose of microscale lenses with the same surface feature and the regular arrangements are important microoptical components. The great light field (LF) regulation and focusing abilities of MLAs have made it essentially in various applications such as imaging, [31][32][33][34][35][36][37][38][39] dynamic target capture, [40][41][42] beaming homogenizing, [43][44][45][46] sensing, [47][48][49] light extractionThe natural compound eyes provide great inspiration for design of advanced imaging devices. Artificial compound eyes (ACEs) with close-packed microlens arrays (MLAs) have attracted enormous research interests due to their remarkable advantages in modern micro-optical systems, such as miniaturization, high integration, tunable focal length, large field of view, and moving objects tracking. Over a decade of intens...

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“…Enormous research efforts have been undertaken in recent years to develop the microwell fabrication technologies toward their applications in 3D tumors. For example, highly ordered microwell arrays can be easily fabricated by soft lithography (Fang et al, 2018) and micromilling (Liu, Chien, Parkinson, & Thierry, 2014) methods. However, the fabricated microwells have a flat circular columnar shape.…”

Section: Introductionmentioning

confidence: 99%

A simple microsphere‐based mold to rapidly fabricate microwell arrays for multisize 3D tumor culture

Guo

Sun

et al. 2020

Biotech & Bioengineering

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Three‐dimensional (3D) tumor has been considered as the best in vitro model for cancer research. In recent years, various methods have been developed to controllable prepare multisize 3D tumors. Nonetheless, reported technologies are still problematic and difficult to produce 3D tumors with highly uniform size and cell content. Here, a novel and simple microsphere‐based mold approach is proposed to rapidly fabricate spherical microwell arrays for multisize 3D tumors formation, culture, and recovery. Larger amounts of HepG2 3D tumors with excellent quality and uniformity can be efficiently generated using this method. In addition, the tumor size can also be simply controlled by adjusting the diameter of the microwell arrays. All experimental results indicated that the proposed method offers a promising platform to generate and recover highly controlled multisize 3D tumors for various cell‐based biomedical research.

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Antireflective Paraboloidal Microlens Film for Boosting Power Conversion Efficiency of Solar Cells

Cited by 37 publications

References 50 publications

Preparation 8.5%-efficient submodule using 5%-efficient DSSCs via three-dimensional angle array and light-trapping layer

Preparation 8.5%-efficient submodule using 5%-efficient DSSCs via three-dimensional angle array and light-trapping layer

Bioinspired Artificial Compound Eyes: Characteristic, Fabrication, and Application

A simple microsphere‐based mold to rapidly fabricate microwell arrays for multisize 3D tumor culture

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