[17a-PA02-1~11] 9.2 Nanoparticles, Nanowires and Nanosheets

▲ [17a-PA02-9] Hybrid Nanostructures of Al-Catalyzed Si Nanowires and Mn-doped Perovskite CsPbCl₃ Nanocrystals for Thin Si Nanowire-based Photovoltaic cells

〇Wipakorn Jevasuwan¹, Bern Yu Jeco Espaldon¹, Mostafa Abdelbar¹, Qinqiang Zhang¹, Mohammed Abdelhameed¹, Naoki Fukata¹ (1.NIMS)

Keywords:nanowire, perovskite nanocrystal, solar cell

Thin silicon (Si) solar cells have been candidates to suppress Si material consumption and to develop into flexible devices. These advantages have come with a trading-off in solar cell efficiency. Si nanowire (NW) structures on thin Si substrates are promising to minimize spectral mismatch optical loss to a great extent by efficient light absorption. However, surface and bulk recombination losses play a dominant role in reducing carrier generation and power conversion efficiency (PCE). Therefore, overcoming these issues together with increasing photogenerated charge carriers is significant to realizing high-efficiency thin SiNW-based solar cells. In this study, thin Si samples provided by pre-chemical etching and post-mechanical polishing were used to demonstrate thin SiNW-based solar cells. The Al-catalyzed SiNW formations and solar cell performances on both pre-etched and post-polished thin Si substrates were investigated. Nonradiative energy transfer (NRET) using manganese (Mn)-doped perovskite (CsPbCl₃) nanocrystals (NCs) were observed as hybrid nanostructure devices that combine absorbing components with SiNW-based solar cells to open new possibilities in broad light-harvesting.