Longfei Song

activity

20222025

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2 papers · 1 filter

cond-mat.mtrl-sci2025

Sub-micron Cu(In,Ga)Se2 solar cell with efficiency of 18.2% enabled by a hole transport layer

Taowen Wang, Longfei Song, Saeed Bayat +6

Reducing the thickness of Cu(In,Ga)Se2 solar cells is a key objective in order to reduce production cost and to improve sustainability. The major challenge for sub-micron Cu(In,Ga)…

cond-mat.mtrl-sci2025

Solution-Based Fabrication of High-Performance K $_{0.5}$ Na $_{0.5}$ NbO $_{3}$ Thin Films for Surface Haptics

Nagamalleswara Rao Alluri, Longfei Song, Stephanie Girod +8

K $_{0.5}$ Na $_{0.5}$ NbO $_{3}$ is among the most promising lead-free piezoelectrics. While its sputtered films match the performance of the champion piezoelectric Pb(Zr,Ti)O $_{3}$ , repro…

Sub-micron Cu(In,Ga)Se2 solar cell with efficiency of 18.2% enabled by a hole transport layer

Solution-Based Fabrication of High-Performance K0.5​Na0.5​NbO3​ Thin Films for Surface Haptics

Solution-Based Fabrication of High-Performance K $_{0.5}$ Na $_{0.5}$ NbO $_{3}$ Thin Films for Surface Haptics