【學術亮點】Interfacial Dedoping Engineering of PEDOT:PSS for High-Performance Sn–Pb Perovskite NIR Photodetectors
Facility Agriculture: Application of Solar Facilities in Agriculture【Department of Chemical Engineering / Lin, Chieh-Ting / Associate Professor】
設施農業：光能設施於農業固碳之應用【化學工程學系/林玠廷 副教授】
| 論文篇名 | 英文：Interfacial Dedoping Engineering of PEDOT:PSS for High-Performance Sn–Pb Perovskite NIR Photodetectors 中文：PEDOT：PSS介面去摻雜工程用於高效能錫–鉛鈣鈦礦近紅外光光偵測器 |
| 期刊名稱 | Advanced Optical Materials |
| 發表年份,卷數,起迄頁數 | 2025, 13(31), no. e01522 |
| 作者 | Shi, Zhong-En; Hsieh, Hsing-Jung; Hsu, Yi-Yang; Lin, Huan Wei; Jiang, Bing-Huang; Lin, Chieh-Ting(林玠廷)*; Chen, Chih-Ping |
| DOI | 10.1002/adom.202501522 |
| 中文摘要 | 錫–鉛（Sn–Pb）鈣鈦礦因其寬廣的光吸收能力與優異的近紅外光（NIR）響應特性，而成為近紅外光光偵測器（PPDs）極具潛力的材料。然而，作為電洞傳輸層（HTL）的 PEDOT:PSS 具有高度摻雜特性，會導致界面再結合，進而限制元件的效能。在本研究中，作者提出了一種簡單且高效的去摻雜策略，利用 1,8-二氮雙環[5.4.0]十一碳-7-烯（DBU） 來改善 PEDOT:PSS 的特性，顯著提升 Sn–Pb 鈣鈦礦光偵測器的性能。研究透過多項綜合評估（包含 UV–可見–近紅外吸收光譜、拉曼光譜、電性分析與表面電位量測）來優化去摻雜過程。這種處理方式能有效改善界面鈍化、降低非輻射再結合，並提升鈣鈦礦的結晶品質。最終，使用去摻雜 PEDOT 的元件顯示出暗電流密度的大幅下降，偵測度高達 1014Jones，可在 380–960 nm 的波長範圍內進行測量，並具有 84.5 dB 的寬近動態範圍（LDR）。這項簡單高效的去摻雜方法不僅提升了元件的性能，也為高效能近紅外光光偵測器的開發提供了有前景的策略。 |
| 英文摘要 | Tin–lead (Sn–Pb) perovskites are highly promising materials for near-infrared (NIR) photodetectors (PPDs) due to their broad light absorption and excellent NIR responsivity. However, the high doping level of PEDOT:PSS as the hole transport layer (HTL) can cause interfacial recombination, limiting device performance. In this study, a simple and efficient dedoping strategy is introduced using 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) to enhance the properties of PEDOT:PSS, significantly boosting the performance of Sn–Pb-based photodetectors. Comprehensive evaluations, including UV–Visible–NIR absorption spectroscopy, Raman spectroscopy, electrical property analysis, and surface potential measurements, are carried out to refine the dedoping process. This treatment improves interfacial passivation, reduces nonradiative recombination, and promotes superior perovskite crystallinity. As a result, devices with dedoped PEDOT demonstrate a considerable reduction in dark current density, a detectivity as high as 1014 Jones measures in the wavelength range of 380 to 960 nm, and a broad near dynamic range (LDR) of 84.5 dB. This simple and efficient dedoping method not only improves device performance but also offers a promising route for advancing high-performance NIR photodetectors. |
| 發表成果與本中心研究主題相關性 | 本研究針對錫–鉛鈣鈦礦近紅外光光偵測器之界面工程進行改良，透過 PEDOT:PSS 去摻雜策略有效提升器件之載流子傳輸與偵測靈敏度。近紅外光光偵測技術可應用於智慧農業監測，如作物生理狀態、病蟲害與水分含量的非破壞式光譜偵測，為高效精準農業感測技術之關鍵元件。因此，本研究成果與永續農業中心推動的農業感測與能源應用技術主題密切相關，對於發展高效能農業感測與環境監控系統具有潛在助益。 |
