Mesoporous silica hybrids as an antireflective coating to enhance light harvesting and achieve over 16% efficiency of organic solar cells

Wang, Yalun; Chen, Mengxue; Li, Donghui; Huang, Zhiwei; Mao, Yuchao; Han, Wen Jiao; Wang, Tao; Liu, Dan

doi:10.1039/c9tc05301h

Cited by 18 publications

(13 citation statements)

References 39 publications

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“…The roughness of bilayer ARC layer is far less than the visible wavelength and will not cause serious light scattering. Compared with the ARC prepared with the mixture of HMDS-MSNs and silica polymer in our previous study [17], the bilayer ARC here has increased hydrophobicity due to the fluorinated silica polymer. The water contact angle (WCA) image of the bilayer ARC is shown as inset in Fig.…”

Section: Resultsmentioning

confidence: 68%

“…The synthesis of HMDS-MSNs, as schemed in Fig. 1a, follows our previous report [17]. The syntheses of silica polymer and fluorinated silica polymer are described in the experimental section and outlined in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The silica polymer used to spin-cast the antireflective coating one (ARC1) was synthesized by the reaction of 200 μL of TEOS and 50 μL of HCl (0.1 mol/L) in 2 mL of 2-propanol at room temperature for 2 h. The fluorinated silica polymer was synthesized with the above method as well, but with 1H,1H,2H,2H-perfluoroalkyltriethoxysilanes replacing TEOS. The HMDS-MSN suspension was synthesized as reported in our previous study [17]. Here, the HMDS-MSN suspension was blended with the fluorinated silica polymer to spin-cast the antireflective coating two (ARC2).…”

Section: Synthesis and Preparation Of Antireflective Coatingsmentioning

confidence: 99%

“…Mesoporous silica nanoparticles (MSNs) have been widely employed as antireflective materials due to its low refractive index (<1.2). Although a single layer ARC could be simply casted by spin-coating the MSN suspension [17,18], the transmittance is limited by the angle and wavelength range of the incident light [19][20][21]. To minimize light reflection in a broadband or even full wavelength range, multilayer ARCs and structured ARCs having graded refractive indices have been explored [21].…”

Section: Introductionmentioning

confidence: 99%

“…95 nm, respectively. The top layer is made from a mixture of hexamethyldisiloxane-modified MSNs (HMDS-MSNs) [17] and a fluorinated silica polymer. The refractive index and thickness of the top layer are 1.21 and ca.…”

Section: Introductionmentioning

confidence: 99%

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Bilayer broadband antireflective coating to achieve planar heterojunction perovskite solar cells with 23.9% efficiency

Wang

Chen

et al. 2020

Sci. China Mater.

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Although perovskite solar cells (PSCs) have achieved encouraging efficiency, the photon loss at the substrate due to light reflection has not been well addressed. Light management is promising to reduce reflection loss and realize higher power conversion efficiency (PCE) of PSCs. Here, a bilayer antireflective coating (ARC) has been designed and coated onto the backside of the glass substrate of (FAPbI 3) x-(MAPbBr 3) 1−x PSCs to enhance photon harvesting and consequently the device efficiency. The bottom layer of the bilayer ARC is made from a silica polymer and the top layer is made from the mixture of hexamethyldisiloxane-modified mesoporous silica nanoparticles and a fluorinated silica polymer. By adjusting the refractive index and the film thickness of each layer according to a two-layer model, enhanced glass transmittance in a broadband wavelength range can be reached, with the maximum transmittance increasing from ca. 90% to over 95%. With the bilayer ARC, the maximum short-circuit current density and PCE of (FAPbI 3) x (MAPbBr 3) 1−x PSCs can be increased from 25.5 mA cm −2 and 22.7% to 26.5 mA cm −2 and 23.9% with negligible changes in fill factor and opencircuit voltage. This work presents a simple yet effective strategy to enhance the efficiency of solar cells employing bilayer antirefective coatings, which can be applied to other types of solar cells.

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Section: Resultsmentioning

confidence: 68%

Section: Resultsmentioning

confidence: 99%

Section: Synthesis and Preparation Of Antireflective Coatingsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Bilayer broadband antireflective coating to achieve planar heterojunction perovskite solar cells with 23.9% efficiency

Wang

Chen

et al. 2020

Sci. China Mater.

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Reducing Optical Reflection Loss for Perovskite Solar Cells Via Printable Mesoporous SiO₂ Antireflection Coatings

Wang

Liu

et al. 2022

Adv Funct Materials

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The power conversion efficiency (PCE) of single-junction perovskite solar cells (PSCs) is being rapidly promoted towards their theoretical limit, with a certified value of 25.7%. Reducing optical loss will further contribute to PCE improvement. Here, the optical loss including reflection loss, absorption loss, and transmission loss in printable mesoscopic perovskite solar cells (p-MPSCs) is analyzed. A printable mesoporous SiO 2 antireflection coating for improving the transmittance of the fluorine-doped tin oxide (FTO) glass substrate by reducing optical reflection at the air/glass interface is reported. With modulated porosity and thickness, the mesoporous SiO 2 film constructs a graded refractive index interface and increases the transmittance of FTO glass by ≈2%-4% in the spectral range of 350-800 nm at normal incident angle with the highest transmittance improved from 85% to 89%. The SiO 2 coating also exhibits wide-angle and broadband antireflection properties. The coatings successfully help p-MPSCs obtain about an average 3% enhancement in the short-circuit current density (J SC ) and PCE. This study demonstrates the necessity of optical management for efficient solar cells and provides a cost-effective and scalable antireflection coating for the future realistic application of PSCs.

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Indoor Organic Photovoltaics for Self‐Sustaining IoT Devices: Progress, Challenges and Practicalization

2021

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Indoor photovoltaics (IPVs) have great potential to provide a self-sustaining power source for Internet-of-Things (IoT) devices. The rapid growth in demand for low-power IoT devices for indoor application not only boosts the development of highperformance IPVs, but also promotes the electronics and semiconductor industry for the design and development of ultra-low-power IoT systems. In this Review, the recent progress in IPV technologies, design rules, market trends, and future prospects for highly efficient indoor photovoltaics are discussed. Special attention is given to the progress and development of organic photovoltaics (OPVs), which demonstrate great possibilities for IPVs, owing to their bandgap tunability, high absorbance coefficient, semitransparency, solution processabil-ity, and easy large-area manufacturing on flexible substrates. Highly efficient indoor organic photovoltaics (IOPVs) can be realized through designing efficient donor and acceptor absorber materials that have good spectral responses in the visible region and better energy-aligned interfacial layers, and through modulation of optical properties. Interfacial engineering, photovoltage losses, device stability, and large-area organic photovoltaic modules are surveyed to understand the mechanisms of efficient power conversion and challenges for IOPVs under indoor conditions as a self-sustaining power source for IoT devices. Finally, the prospects for further improve in IOPV device performance and practical aspects of integrating IOPVs in low-power IoT devices are discussed.

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Mesoporous silica hybrids as an antireflective coating to enhance light harvesting and achieve over 16% efficiency of organic solar cells

Abstract: Mesoporous silica nanoparticle hybrids have been synthesized and explored to cast as an antireflective coating onto the glass substrate of non-fullerene organic solar cells (OSCs) to enhance the light absorption and efficiency (from 15.4% to 16.2%).

Cited by 18 publications

References 39 publications

Bilayer broadband antireflective coating to achieve planar heterojunction perovskite solar cells with 23.9% efficiency

Bilayer broadband antireflective coating to achieve planar heterojunction perovskite solar cells with 23.9% efficiency

Reducing Optical Reflection Loss for Perovskite Solar Cells Via Printable Mesoporous SiO₂ Antireflection Coatings

Indoor Organic Photovoltaics for Self‐Sustaining IoT Devices: Progress, Challenges and Practicalization

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Mesoporous silica hybrids as an antireflective coating to enhance light harvesting and achieve over 16% efficiency of organic solar cells

Abstract: Mesoporous silica nanoparticle hybrids have been synthesized and explored to cast as an antireflective coating onto the glass substrate of non-fullerene organic solar cells (OSCs) to enhance the light absorption and efficiency (from 15.4% to 16.2%).

Cited by 18 publications

References 39 publications

Bilayer broadband antireflective coating to achieve planar heterojunction perovskite solar cells with 23.9% efficiency

Bilayer broadband antireflective coating to achieve planar heterojunction perovskite solar cells with 23.9% efficiency

Reducing Optical Reflection Loss for Perovskite Solar Cells Via Printable Mesoporous SiO2 Antireflection Coatings

Indoor Organic Photovoltaics for Self‐Sustaining IoT Devices: Progress, Challenges and Practicalization

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Reducing Optical Reflection Loss for Perovskite Solar Cells Via Printable Mesoporous SiO₂ Antireflection Coatings