Back-contact perovskite solar cell fabrication via microsphere lithography

Deng, Siqi; Tan, Boer; Chesman, Anthony S. R.; Lu, Jianfeng; McMeekin, David P.; Ou, Qingdong; Scully, Andrew D.; Raga, Sonia R.; Rietwyk, Kevin J.; Weissbach, Anton; Zhao, Boya; Voelcker, Nicolas H.; Cheng, Yi‐Bing; Lin, Xiongfeng; Bach, Udo

doi:10.1016/j.nanoen.2022.107695

Cited by 4 publications

(4 citation statements)

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Section: Resultssupporting

confidence: 49%

“…This capability will have many applications for novel optoelectronic devices such as electrically pumped photonic crystal lasers, vertical organic field-effect transistors, and in-plane organic LEDs. Its compatibility with NIL enables us to achieve an L E value of 230 nm, which is close to an order of magnitude smaller than the previous record L E of 1400 nm, and its simplicity and ease of use will make BC-PSC production more accessible to the wider research community. However, we find that the efficiency of our BC-PSCs remains almost unchanged for L E values between 230 and 2000 nm, leading us to conclude that BC-PSCs have now reached the point where device geometry is no longer their limiting factor.…”

Section: Discussionmentioning

confidence: 88%

“…Through this process, we have created BC-PSCs with an L E value of 230 nm, which is close to an order of magnitude smaller than the next smallest reported, but our SPO of 1.45% falls far below the 8.6% SPO record set by Bach and co-workers. 18 Their work used a similar final device structure, but with an L E of 1400 nm. Hence, it could be possible that reducing the feature size too much is actually detrimental to the performance of the device, perhaps due the decreased feature size making the electric field too weak near the surface of the perovskite layer.…”

Section: Resultsmentioning

confidence: 99%

“…Prince et al used the natural cracks that can be formed in a polymer film to produce quasi-interdigitated structures with an L E of roughly 2 μm and a stabilized efficiency of 2.9%. 17 Finally, Bach and co-workers set the world record for BC-PSCs by using microsphere lithography to achieve a stabilized efficiency of 8.6%, 18 and this impressive result was attributed to their extremely low L E value of 1.4 μm.…”

Section: Introductionmentioning

confidence: 99%

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Nanoimprint Lithography as a Route to Nanoscale Back-Contact Perovskite Solar Cells

Harwell

Samuel

2023

ACS Appl. Nano Mater.

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Back-contact perovskite solar cells are of great interest because they could achieve higher performance than conventional designs while also eliminating the need for transparent conductors. Current research in this field has focused on making electrode structures with reduced widths to collect charges more efficiently, but current lift-off-based fabrication techniques have struggled to achieve electrode widths smaller than 1000 nm and are difficult to implement on large areas. We demonstrate nanoimprint lithography in an etch-down procedure as a simple and easily scalable method to produce honeycomb-shaped, quasiinterdigitated electrode structures with widths as small as 230 nm. We then use electrodeposition to selectively deposit conformal coatings of a range of different hole-selective layers and explore how the efficiency of back-contact perovskite solar cells changes as the feature sizes are pushed into the nanoscale. We find that the efficiency of the resulting devices remains almost unchanged as the electrode width is varied from 230 to 2000 nm, which differs from reported device simulations. Our results suggest that reducing recombination and improving the quality of the charge transport layers, rather than reducing the minimum feature size, are likely to be the best pathway to maximizing the performance of backcontact perovskite solar cells.

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Section: Resultssupporting

confidence: 49%

Section: Discussionmentioning

confidence: 88%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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