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• Determining effects of doping lithium nickel oxide with tungsten using Compton scattering 

  Kothalawala, Veenavee Nipunika; Suzuki, Kosuke; Li, Xin; Barbiellini, Bernardo; Nokelainen, Johannes; Makkonen, Ilja; Ferragut, Rafael; Tynjälä, Pekka; Laine, Petteri; Välikangas, Juho; Hu, Tao; Lassi, Ulla; Takano, Kodai; Tsuji, Naruki; Amada, Yosuke; Sasikala, Devi Assa Aravindh; Alatalo, Matti; Sakurai, Yoshiharu; Sakurai, Hiroshi; Babar, Mohammad; Vishwanathan, Venkatasubramanian; Hafiz, Hasnain; Bansil, Arun (AIP Publishing, 2024)

  X-ray Compton scattering experiments along with parallel first-principles computations were carried out on LiNiO2 to understand the effects of W doping on this cathode material for Li-ion batteries. By employing high-energy ...

• Strain effects in phosphorus bound exciton transitions in silicon 

  Loippo, Teemu; Kanniainen, Antti; Muhonen, Juha T. (American Physical Society (APS), 2023)

  Donor spin states in silicon are a promising candidate for quantum information processing. One possible donor spin readout mechanism is the bound exciton transition that can be excited optically and creates an electrical ...

• Modeling optical constants from the absorption of organic thin films using a modified Lorentz oscillator model 

  Dutta, Arpan; Tiainen, Ville; Qureshi, Hassan Ali; Duarte, Luís; Toppari, J. Jussi (Optica Publishing Group, 2022)

  Optical constants of organic thin films can be evaluated using the Lorentz oscillator model (LOM) which fails to fit inhomogeneously broadened absorption of highly concentrated molecular films. In modified LOM (MLOM), the ...

• Compton scattering study of strong orbital delocalization in a LiNiO2 cathode 

  Kothalawala, Veenavee Nipunika; Suzuki, Kosuke; Nokelainen, Johannes; Hyvönen, Arttu; Makkonen, Ilja; Barbiellini, Bernardo; Hafiz, Hasnain; Tynjälä, Pekka; Laine, Petteri; Välikangas, Juho; Hu, Tao; Lassi, Ulla; Takano, Kodai; Tsuji, Naruki; Amada, Yosuke; Devi, Assa Aravindh Sasikala; Alatalo, Matti; Sakurai, Yoshiharu; Sakurai, Hiroshi; Bansil, Arun (American Physical Society (APS), 2024)

  Cobalt is used in Li-ion batteries, but it is expensive and could be replaced by nickel to deliver better performance at a lower cost. With this motivation, we discuss how the character of redox orbitals of LiNiO2 can be ...

• Co-precipitation of Mg-doped Ni0.8Co0.1Mn0.1(OH)2 : effect of magnesium doping and washing on the battery cell performance 

  Laine, Petteri; Hietaniemi, Marianna; Välikangas, Juho; Kauppinen, Toni; Tynjälä, Pekka; Hu, Tao; Wang, Shubo; Singh, Harishchandra; Lassi, Ulla (Royal Society of Chemistry, 2023)

  Co-precipitation of Ni0.8Co0.1Mn0.1(OH)2 (NCM811) and Mg-doped (0.25 wt% and 0.5 wt%) NCM811 precursors is carried out from concentrated metal sulphate solutions. In this paper, the aim is to study the role of magnesium ...