Surface Passivation and Carrier Collection in {110}, {100} and Circular Si Microwire Solar Cells

Ro, Yun Goo; Chen, Renjie; Liu, Ren; Li, Nan; Williamson, Theodore J.; Yoo, Jung Yul; Sim, Sangwan; Prasankumar, R. P.; Dayeh, Shadi A.

doi:10.1002/aenm.201802154

Cited by 5 publications

(3 citation statements)

References 47 publications

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“…In general, increasing the length of the NC arrays can improve the absorption, but this improvement in the wide area of surface to volume ratio may also increase the loss of nonradiative recombination due to faults at the side surface, let alone the difficulties of fabricating the NCs. Therefore, choosing the appropriate length to balance between increasing light absorption and limiting surface recombination is also essential in obtaining the maximum solar energy harvesting [27].…”

Section: Introductionmentioning

confidence: 99%

A Feedback Analytic Algorithm for Maximal Solar Energy Harvesting of InP Stepped Nanocylinders

Wu,

Lu,

Tan

et al. 2024

IEEE Photonics J.

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Due to the potential for high energy harvesting capacity, subwavelength scale semiconductor nanostructured arrays are used to address the issue of single-junction thin-film solar cells' limited solar energy harvesting. Along with numerical simulations, an effective and efficient algorithm is crucial to maximizing the optical field modulation and energy trapping capacity of nanostructures. Based on the effective medium theory and the leaky mode resonance, an analytical feedback algorithm is suggested in this study to determine the precise the dimensions of vertically aligned InP stepped nanocylinders (SNCs) for maximum solar energy absorption. For both square and hexagonally arranged two-segment or three-segment InP SNC arrays, the ideal geometrical dimensions were quantitatively estimated for maximum energy harvesting. Densities of shortcircuit current Jscs under the AM 1.5G spectrum's illumination as the measurement standard, they were computed for each SNC array. The maximal Jsc of 32.85 mA/cm 2 was obtained with square three-segment InP SNC arrays. The optimized SNC arrays for the maximum light absorption are also validated and examined using thorough finite-difference time-domain computational simulations. The algorithm estimated maximum Jsc had tolerances of under 1.8% for all scenarios, which, when compared to simulations, shows that this analytical method offers a practical and efficient means to direct the design of highperformance InP SNC arrays solar cells.

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Section: Introductionmentioning

confidence: 99%

A Feedback Analytic Algorithm for Maximal Solar Energy Harvesting of InP Stepped Nanocylinders

Wu,

Lu,

Tan

et al. 2024

IEEE Photonics J.

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“…In photovoltaic applications, screen‐printing is primarily employed in printing patterned Ag electrodes for crystalline‐silicon photovoltaic cells (c‐Si PVs), and then in printing mesoporous TiO 2 layer for dye‐sensitized solar cells (DSSCs). [ 40 , 41 , 42 , 43 , 44 ] In the last decade, considering the advantages of screen‐printing technology in producing multi‐functional thin films, the concept of all screen‐printed PSCs has been proposed, which could greatly reduce the cost and time consumption of fabricating PSCs on a large scale. Actually, some functional layers in PSCs, such as mesoporous/compact electron transport layer and carbon electrode, have already been shown to be screen‐printable, but the screen‐printing of perovskite film is challenging due to the extremely low viscosity of perovskite precursor solution based on traditional organic solvents.…”

Section: Introductionmentioning

confidence: 99%

Screen‐Printing Technology for Scale Manufacturing of Perovskite Solar Cells

et al. 2023

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As a key contender in the field of photovoltaics, third‐generation thin‐film perovskite solar cells (PSCs) have gained significant research and investment interest due to their superior power conversion efficiency (PCE) and great potential for large‐scale production. For commercialization consideration, low‐cost and scalable fabrication is of primary importance for PSCs, and the development of the applicable film‐forming techniques that meet the above requirements plays a key role. Currently, large‐area perovskite films are mainly produced by printing techniques, such as slot‐die coating, inkjet printing, blade coating, and screen‐printing. Among these techniques, screen printing offers a high degree of functional layer compatibility, pattern design flexibility, and large‐scale ability, showing great promise. In this work, the advanced progress on applying screen‐printing technology in fabricating PSCs from technique fundamentals to practical applications is presented. The fundamentals of screen‐printing technique are introduced and the state‐of‐the‐art studies on screen‐printing different functional layers in PSCs and the control strategies to realize fully screen‐printed PSCs are summarized. Moreover, the current challenges and opportunities faced by screen‐printed perovskite devices are discussed. This work highlights the critical significance of high throughput screen‐printing technology in accelerating the commercialization course of PSCs products.

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“…Therefore, to reduce the diffusion length of the etchant, small cavities were always introduced into the basal plane of Au catalyst films by either increasing the evaporation rate or adding tiny sphere patterns. , However, silicon nanowires will also be formed during the etching process due to the presence of cavities in the metal films. That is why the reported Si microwire solar cells are always made from reactive-ion etching (RIE). ,, …”

Section: Introductionmentioning

confidence: 99%

Shape-Controlled Silicon Microwire Arrays from Au–Ag-Catalyzed Metal-Assisted Chemical Etching for Radial Junction Solar Cells

Lin

Gao

et al. 2019

ACS Appl. Energy Mater.

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Metal-assisted chemical etching (MaCE) has been extensively studied as a cost-effective way to produce silicon nano/micro structure arrays. However, it is hard to keep the resultant morphologies of the nano/micro structures exactly consistent with the original designs because the MaCE process is affected by multiple factors, such as catalyst type, etching solution, temperature, and the interaction with one another. Here, we first proposed an etching model to address the different MaCE behaviors of using Ag, Au, and Ag/Au as catalysts. The model was then independently proven by systematic experiments on the Ag/Au catalyst, with the Au film playing mainly as the frame and the lower Ag film boosting the catalytic activity by increased tiny cavities. With the Ag/Au catalyst, silicon nano/micro arrays with smooth and controllable morphologies from the bottom to the top surface can be successfully formed. Finally, fine-tuned silicon microwire arrays were applied to produce radial junction solar cells, showing a 1.8% increase in absolute efficiency in comparison with the reference cell made by a single metal catalyst. Our findings show that the modified MaCE with Ag/Au catalyst can be an effective way to acquire shape-controlled solar cells with enhanced efficiency.

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Surface Passivation and Carrier Collection in {110}, {100} and Circular Si Microwire Solar Cells

Cited by 5 publications

References 47 publications

A Feedback Analytic Algorithm for Maximal Solar Energy Harvesting of InP Stepped Nanocylinders

A Feedback Analytic Algorithm for Maximal Solar Energy Harvesting of InP Stepped Nanocylinders

Screen‐Printing Technology for Scale Manufacturing of Perovskite Solar Cells

Shape-Controlled Silicon Microwire Arrays from Au–Ag-Catalyzed Metal-Assisted Chemical Etching for Radial Junction Solar Cells

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