[14a-2M-1~11] 13.10 Compound solar cells

▼ [14a-2M-2] Correlation between Capping Ligands and Photovoltaic Properties in PbS Quantum Dot Solar Cells

〇(P)Jin Chang^1,4, Yuki Kuga¹, Taro Toyoda^1,4, Yuhei Ogomi^2,4, Shuzi Hayase^2,4, Kenji Katayama³, Qing Shen^1,4 (1.Univ. Electro-Commun., 2.Kyushu Inst. Tech., 3.Chuo Univ., 4.CREST JST)

Keywords:quantum dots,surface chemistry,solar cells

Colloidal quantum dots (QDs) are generally capped with long-chain, electrically insulating ligands which are introduced during the synthetic procedures. Replacement of these molecules with shorter chain ligands has been shown necessary to decrease the inter-dot spacing and improve the electron transfer in QD thin films. This work investigate the impact of the ligand chain length and scaffold on the photovoltaic properties and carrier dynamics in PbS quantum dot solar cells (QDSCs) by ultrafast transient absorption (TA) spectroscopy, temperature-dependent photoluminescence (PL) and transient photovoltage decay measurements.