以酯基聚合物構建無機鹵化物鈣鈦礦之放光增益與邏輯特性

Abstract

本研究致力於提升鈣鈦礦發光二極體 (PeLEDs) 的光電性能，同時構建具光學邏輯特性的半導體應用。在現今半導體元件的發展中，光電訊號的增益和邏輯性在提升資訊讀取與加密功能方面具有關鍵作用。鈣鈦礦材料因其優異的光電轉換效率、可調控的波長範圍及高純度的光學性質，成為新一代半導體技術的理想材料。然而，進一步增強其放光強度、穩定性及實現光學邏輯特性仍是當前研究的挑戰。 本研究提出兩大創新策略，分別針對增強鈣鈦礦放光性能及調控其晶體結構來實現光學邏輯特性。在第一部分中，我們利用聚己內酯 (PCL) 封端的銀奈米粒子 (AgNPs) 製備出穩定且高效的放光增益層。該增益層通過 Förster Resonance Energy Transfer (FRET) 機制，將鈣鈦礦次相發出的能量轉移至主相，大幅提高放光強度。此外，該增益層還具有 Purcell 效應，通過增強 plasmonic-excitons 來提升 PeLED 的自發輻射速率，使其在亮度和外部量子效率 (EQE) 方面取得顯著提升，展示出在高性能鈣鈦礦光電元件中的應用潛力。 在第二部分研究中，我們將結晶性酯基聚合物 (ester polymer) 與鈣鈦礦混摻，通過離子-偶極子相互作用 (ion-dipole interaction) 調控鈣鈦礦晶體的生長與尺寸，實現不同波段的放光邏輯特性。研究結果表明，酯基聚合物不僅有效改善了鈣鈦礦晶體的形貌和穩定性，還通過調節晶體結構提升了光致發光性能，特別是在高結晶性酯基聚合物 (hc-ester polymer) 的輔助下，光邏輯特性得到了進一步增強。此外，該系統展現出作為動態光邏輯傳感器的潛力，適用於未來柔性光電元件的應用。 期望本研究通過開發具有放光增益的鈣鈦礦-聚合物複合材料，並調控其晶體尺寸來構建多波段光學邏輯特性，能為新一代柔性光電元件的設計與應用提供全新思路。

This research is dedicated to improving the optoelectronic performance of perovskite light-emitting diodes (PeLEDs) and constructing semiconductor applications with optical logic properties. In the development of today's semiconductor components, the gain and logic of photoelectric signals play a crucial role in improving information reading and encryption functions. Perovskite materials have become ideal materials for the new generation of semiconductor technology due to their excellent photoelectric conversion efficiency, controllable wavelength range, and high-purity optical properties. However, further enhancing its luminous intensity and stability and realizing optical logic properties are still challenges in current research. This study proposes two innovative strategies to enhance perovskite's light emission performance and regulate its crystal structure to achieve optical logic properties. In the first part, we prepare a stable and efficient light-emitting gain layer using polycaprolactone (PCL)-terminated silver nanoparticles (AgNPs). This gain layer transfers the energy emitted by the perovskite minor phase to the main phase through the Förster Resonance Energy Transfer (FRET) mechanism, significantly increasing the emission intensity. In addition, the gain layer also has the Purcell effect, which enhances the spontaneous emission rate of PeLED by enhancing plasmonic-excitons, resulting in significant improvements in brightness and external quantum efficiency (EQE), demonstrating its application potential in high-performance perovskite optoelectronic components. In the second part of the study, we mixed a crystalline ester polymer with a quasi-two-dimensional perovskite and controlled the growth and size of the perovskite crystal through ion-dipole interaction to achieve luminescence in different wavelength bands with logical characteristics. Research results show that ester-based polymers not only effectively improve the morphology and stability of perovskite crystals but also improve the photoluminescence performance by adjusting the crystal structure. Especially with the assistance of highly crystalline ester-based polymers, the optical logic properties of perovskites are further enhanced. Furthermore, the system shows potential as a dynamic optical logic sensor for future applications in flexible optoelectronic components.