講演情報
[14p-P08-12]Formation of Copper Iodine Layers from Copper Nitride Thin Films by RF Magnetron Sputtering with Varying Deposition Times
〇(D)Auttaphon Ploypradit1, Masao Isomura1, Tetsuya Kaneko1 (1.Tokai Univ.)
キーワード：
Copper nitride、Copper iodide、RF magnetron sputtering
The hole transport layer (HTL) is crucial in perovskite solar cells (PSCs). While spiro-OMeTAD is commonly used, its instability remains an issue. This study explores copper iodine (CuI) as an alternative HTL due to its wide band gap, high mobility, and easy fabrication. CuI was derived from copper nitride (Cu3N) thin films, iodized using an ethanol/iodine solution. Cu3N thin films were deposited via RF magnetron sputtering with mixed Ar and N2 gas for 30, 60, and 150 min at room temperature. Resistivity, tested by the four-point probe, increased from 1.65 ohm·cm (30 min) to 9.28 ohm·cm (150 min). Optical properties were analyzed using a spectrophotometer, revealing narrower band gaps for short-time deposition. Post-iodization, voids remarkably appeared in CuI layers with short-time deposition, likable y due to variations in Cu3N characteristics. Further details on CuI layers and their PSCs applications will be discussed in the presentation.