An international team of researchers used a new interface treatment to improve the performance of perovskiet solar cells over a series of narrow and wide tire gap some connection, tandem and mini module samples. A full perovskite tandem Solar cell demonstrated its use with a certified efficiency of 29.5%.
An international research team led by Huazhong University of Science and Technology was able to improve (SN-PB) Single Junction Tin-Lead Perovskiet solar cells, as well as all perovskite tandem and mini module variations. With the help of a new Mercapto-Functionalized Scaffolding interfacial engineering strategy.
In the study, “Mercapto-Functionalized Steiger improves perovskiet buried interfaces for tandem photovoltaic“Published in Nature communicationbeschrijven de onderzoekers hoe hun aanpak een smalle bandgap (NBG) met één junctie mogelijk maakte perovskiet-zonnecel met een stroomomzettingsefficiëntie van 23,7%, een twee-terminale (2T) all-perovskiet tandem-zonnecel met een gecertificeerde efficiëntie van 29,5%en 24,7%-efficiënte mini-modules die 5 × 5 CM2 maten.
With regard to stability tests, the modified solar cells consistently exceeded better than the control devices, according to the research.
“The compatibility of our strategy in several architectures was very encouraging. We successfully applied it to narrow-bandap tin lead (SN-PB) Perovskites, Wide-Bandgap (WBG) Perovskites and conventional bandgap perovskites,” Songhao Liu, Telled the author, told, told you PV Magazine. ‘This universal interfacial engineering approach shows considerable potential for scaling perovskiet solar modules. “
To begin with, the group identified nanovoids or microscopic empty spaces on the buried interface between the pedot: PSS Hole Transport Layer (HTL) and the narrow-band gap tin-drawer perovskite as a critical factor that breaks down device performance, according to Liu.
“To tackle this, we have developed a Mercapto-Functionalized Mesoporous Silica Nanoscaffold strategy. This approach at the same time modulates perovskiet crystallization to eliminate nanovoids, suppresses the tin (II) oxidation, passives interfacial defects, said Liu.
The superstructure scaffolding consisted of (3-Mercaptopropyl) Trimethoxysilan (MPTS) Functionalized Mesoporous Silica Nanoparticles (MSN), which the researchers indicate as MSN-SH.
Various devices were demonstrated and characterized in the study. The NBG sun cells had an open circuit voltage of up to 0.89 V and an efficiency of 23.7%. Further tests with the MSN-SH treatment were performed on neat lead cells with band gaps of 1.52 EV, 1.68 EV and 1.77 EV and compared to control devices. The team discovered that the buried interface modification method was consistently effective. In particular, the 1.77 EV Brede BandGap (WBG) Solar cell achieved efficiency of up to 20.6% with an open circuit voltage of 1.33 V. In line with the certified results.
To further demonstrate the technology, a monolithic 2t-complete perovskiet tandem cell was manufactured. It had a certified efficiency of 29.50% and a maximum power efficiency of 28.7%. The performance was certified by the Shanghai Institute of MicroSystem and Information Technology in China.
“Encouraging this is one of the highest performance values reported for the Monolithic two-termal all-perovskiet tandems, according to our best knowing,” the researchers said.
The all-perovskite tandem device was as follows: Glass, IndiumTin-Oxide (ITO), a methyl-gesubstituated carbazol (ME-4PACZ) hole transport layer (HTL), an MSN-SH/WBG Perovskite-Absorber (PDAIDIDIDID buckminerfulere (c60), een buckminfulere (c60) Electron Transport Layer (ETL), een BathocuProine (BCP) bufferlaag, tinoxide (SNO), een goud (AU) metaalcontact, een PEDOT: PSS HTL, de MSN-SH, NBG Perovskite-laag, A ethyleendiammonium diodide (EDAI2) Passivering Layer, C60, BCP and AG.
In thermal stability tests, the tandem device retained 82% of its initial efficiency for 150 hours at 85 ° C, while the control devices “only 43% of their initial efficiency retained after 100 hours,” the scientists reported.
In addition, the device-based device based on MSN-SH showed ‘promising’ operational stability under MPPT conditions with 93% of the initial efficiency that was retained after 450 hours, which is better compared to 68% after 370 hours before the control device.
The Tandem mini modules were made at 5 x 5 cm2 glasses of substrates with a subcel width of 6.8 mm. Testing reveals an average efficiency of 24.2% and a best value of 24.7%. The encapsulated MSN-SH Mini module could also maintain more than 80% of the initial efficiency after more than 290 hours of continuous operation.
The team said that these results suggest that a “superior upscaling potential of the MSN-SH buried interface modification for multijunction devices” emphasizes that the design strategy offers “valuable insights for the community in developing functional superstructure that can accurately modulate the buried interfectronic employees”.
Looking at future research topics, LiU said that according to these lines the work will continue and new functionalized Nano-Scaffolds will investigate, possibly with the help of alternative ligarge groups, with the emphasis on further loading transport optimization and long-term operational. The group can also apply the strategy to other opto-electronic devices such as photo detectors and light-emitting diodes (LED).
Het onderzoeksteam omvatte wetenschappers van de Chinese Academie van Wetenschappen, Huaneng Clean Energy Research Institute, East China University of Science and Technology, Shenzhen Polytechnic University, Southern University of Science and Technology, Sustch Energy Institute for Carbon Neutrality, Wuhan University of Technology, Optics Valley Laboratory, All in China, together with researchers from the University of Oxford, in the UK Oxford, in the UK and Kyoto, Japan.
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