Autor: Siffalovic, Peter - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Ionic liquid-assisted growth of high-quality methylammonium lead bromide single crystals for photodetection applications
Autorzy:: Kruszyńska, Joanna
Mahapatra, Apurba
Mrkyvkova, Nada
Yadav, Pankaj
Prochowicz, Daniel
Siffalovic, Peter
Anilkumar, Vishnu
Wydawca:: Royal Society of Chemistry
Cytata wydawnicza:: J. Mater. Chem. C, 2024, 12, 2953. DOI https://doi.org/10.1039/D3TC04511K
Opis:: National Science Centre
The control of nucleation temperature and growth kinetics during inverse temperature crystallization (ITC) is critical for achieving high-quality perovskite single crystals (SCs) for various optoelectronic applications. Here, we show that the addition of a 1-butyl-3-methylimidazolium bromide (BMIB) ionic liquid to the methylammonium lead bromide (MAPbBr3) precursor solution not only reduces the nucleation temperature from 80 1C to 60 1C but also substantially improves the crystal quality and optoelectronic properties. Specifically, MAPbBr3 SCs grown in the presence of BMIB exhibit better crystallinity with reduced lattice strain, nonradiative recombination and trap density compared to the MAPbBr3 SCs grown by the conventional ITC method at 80 1C. The high quality of the BMIB-based MAPbBr3 SCs enabled us to build an efficient planar-structured photodetector with high responsivity to green light (530 nm). This study shows that the ionic liquid-assisted growth of perovskite SCs has a significant influence on the crystal properties, which is beneficial for optoelectronic SC-based devices.
Dostawca treści:: Repozytorium Centrum Otwartej Nauki

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Skocz do pozycji: 2.

Tytuł:: T-shaped-N-doped polycyclic aromatic hydrocarbons: A new concept of dopant-free organic hole-transporting materials for perovskite solar cells
Autorzy:: Kruszyńska, Joanna
Wagner, Jakub
Lindner, Marcin
Prochowicz, Daniel
Mahapatra, Apurba
Mrkyvkova, Nada
Yadav, Pankaj
Chavan, Rohit D.
Kubas, Adam
Akin, Seckin
Ans, Muhammad
Siffalovic, Peter
Wydawca:: ACS Publications
Opis:: Although metal halide perovskites are positioned as the most powerful light-harvesting materials for sustainable energy conversion, there is a need for a thorough understanding of molecular design principles that would guide better engineering of organic hole-transporting materials (HTMs), which are vital for boosting the performance and stability of perovskite solar cells (PSCs). To address this formidable challenge, here, we developed a new design strategy based on the curved N-doped polycyclic aromatic hydrocarbon (N-PAHs) merged with T-shaped phenazines being decorated with (phenyl)- di-p-methoxyphenylamine (OMeTAD) – N-PAH23/24 and -3,6-ditertbutyl carbazole. (TBCz) – N-PAH25/26. As N-PAH23/24 exhibited satisfying thermal stability, the comparative studies performed with various experimental and simulation methods revealed a pronounced correlation between the depth of the central cyclazine core and the form of T-shape units. This proved to be a crucial factor in controlling their π-π intermolecular interaction as well as self-assembly behavior with the perovskite layer, leading to enhanced humidity resistance, operational stability, and a maximum power conversion efficiency (PCE) of 20.39% denoted for N-PAH23, which is superior to the benchmarked device with doped spiro-OMeTAD (19.23%). These studies resulted not only in optimized stability and device performance but also opened a conceptually new chemical space in photovoltaic technology.
National Science Centre: grant SONATA BIS 10, no. 2020/38/E/ST5/00267; National Science Centre, Poland, grant no. 2018/31/D/ST5/00426; scholarship awarded by the Polish Ministry of Education and Science to outstanding young scientists (2/DSP/2021); Foundation for Polish Science: START (093.2023).
Dostawca treści:: Repozytorium Centrum Otwartej Nauki

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Tytuł:: Molecular modification of spiro[fluorene-9,90- xanthene]-based dopant-free hole transporting materials for perovskite solar cells
Autorzy:: Kruszyńska, Joanna
Kumar, Deepak
Kumar, Kodali Phani
Singh, Surya Prakash
Kumar, Vinay
Yadagiri, Bommaramoni
Mahapatra, Apurba
Mrkyvkova, Nada
Yadav, Pankaj
Nawrocki, Jan
Nikiforow, Kostiantin
Chavan, Rohit D.
Prochowicz, Daniel
Akin, Seckin
Ans, Muhammad
Siffalovic, Peter
Wydawca:: Royal Society of Chemistry
Cytata wydawnicza:: J. Mater. Chem. A, 2024, 12, 8370. DOI https://doi.org/10.1039/D3TA07851E
Opis:: The molecular engineering of organic hole-transporting materials (HTMs) plays an important role in enhancing the performance and stability of perovskite solar cells (PSCs) as well as reducing their fabrication cost. Here, two low-cost spiro-OMeTAD analogues, namely SP-Naph and SP-SMe, featuring a spiro[fluorene-9,9-xanthene] (SFX) central core and asymmetric subunits are designed and synthesized. Specifically, the SFX core in the SP-Naph molecule is substituted with dimethoxyphenylnaphthylamine subunits to enhance conductivity and charge transport properties by expansion of the p-conjugated structure. On the other hand, in the molecular structure of SP-SMe, the methoxy groups (–OMe) from diphenylamine units were partially replaced with the methylsulfanyl groups (–SMe) to increase interaction with the perovskite surface through the “Lewis soft” S atoms. By combining various experimental and simulation methods, thestructure–property relationship of the newly synthesized HTMs was thoroughly investigated. The suitable HOMO energy level with the perovskite layer together with superior photoelectric properties and enhanced thermostability and humidity resistivity are obtained for the SP-SMe HTM. As a result, the planar n–i–p PSC with the dopant-free SP-SMe HTM yields a maximum power conversion efficiency (PCE) of 21.95%, which outperforms that with SP-Naph (20.51%) and doped spiro-OMeTAD (19.23%). Importantly, the device with SP-SMe also reveals enhanced operational stability under continuous 1 sun illumination and thermal stability at 65 °C. These findings provide valuable insight for the rational design of dopant-free organic HTMs based on the SFX core, which would promote the development of highly efficient and stable devices.
National Science Centre
Dostawca treści:: Repozytorium Centrum Otwartej Nauki

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