| 摘要: | 本篇論文開發出12個電洞傳輸層材料 (hole transport martials, HTMs)，作為自組裝單分子層 (self-assembled monolayers, SAMs)，沉積在NiOx薄膜上，應用於錫鈣鈦礦太陽能電池 (Sn-PSC)，並依照使用的不同核心：雙噻吩醯亞胺 (bithiophene-imide, BTI) 與芳香環 (aromatic ring, Ar) 分為兩個系列。
本研究第一系列以不同碳鏈長之BTI作為核心，於一端接上推電子基團三苯胺(triphenylamine, TPA)，另一端則分別接上錨定基團氰乙酸乙烯基 (cyanoacetic acid, CA)、氰磷酸二乙酯乙烯基 (diethyl cyanomethylphosphonate, PE) 和氰磷酸乙烯基 (cyanophosphonic acid, PA)，合成出 BTI-8-CA (1)、BTI-16-CA (1’)、BTI-8-PE (2)、BTI-16-PE (2’)、BTI-8-PA (3) 與 BTI-16-PA (3’) 六個材料，以自組裝的方式製成元件應用於錫鈣鈦礦太陽能電池。
本研究第二部份亦開發一系列自組裝材料，首先使用三種芳香環：苯 (phenyl, P)、噻吩 (thiophene, T)、硒吩 (selenophene, Sp) 作為間隔基團 (spacer group)，以調控材料能階及增加分子內電荷轉移，一端以三苯胺 (TPA) 為推電子基團，另一端分別接上氰磷酸二乙酯乙烯基 (PE) 和氰磷酸乙烯基 (PA)，合成出TPA-P-PE (4)、TPA-P-PA (5)、TPA-T-PE (6)、TPA-T-PA (7)、TPA-Sp-PE (8) 和 TPA-Sp-PA (9) 六個材料，此系列材料同樣以自組裝製程，搭配NiOx應用於錫鈣鈦礦太陽能電池進行元件測試，其中 TPA-Sp-PE (8) 及 TPA-Sp-PA (9) 光電轉換效率分別達到8.3 % 與8.4%，能與目前使用自組裝製程的錫鈣鈦礦太陽能電池材料 (TQxD) 之最高報導效率 8.3% 相媲美，期盼後續條件優化能有進一步提升。
為了進一步了解材料的光學和電化學性質，已藉由 UV-Vis 和 DPV進行測定 (如Eg 和 HOMO / LUMO)，並透過TGA和DSC進行熱穩定性量測，以及使用SXRD鑑定單晶結構，目前已將以上新開發之自組裝材料送測元件效能，期望元件效率能進一步提高。
;This study develops twelve hole transport materials (HTMs) as self-assembled monolayers (SAMs) deposited on NiOx films for tin-based perovskite solar cells (Sn-PSC). These HTMs are categorized into two series based on bithiophene-imide (BTI) and aryl (Ar) groups as central cores.
The first series involves BTI core with varying carbon chain lengths and electron-donating triphenylamine (TPA) groups at one end, and anchoring groups such as cyanoacetic acid (CA), diethyl cyanomethylphosphonate (PE), and (cyanomethyl)phosphonic acid (PA) at the other end. Consequently, six materials, BTI-8-CA (1), BTI-16-CA (1′), BTI-8-PE (2), BTI-16-PE (2′), BTI-8-PA (3), and BTI-16-PA (3′), were synthesized and applied in Sn-PSCs via self-assembly.
The second series of SAMs was developed using three aromatic rings—phenyl (P), thiophene (T), and selenophene (Sp)— as spacer groups to modulate material energy levels and enhance intramolecular charge transfer. TPA served as the electron-donating group at one end, while PE and PA were attached at the other end. This led to the synthesis of six materials: TPA-P-PE (4), TPA-T-PE (5), TPA-Sp-PE (6), TPA-P-PA (7), TPA-T-PA (8), and TPA-Sp-PA (9). Currently, these materials are being applied in Sn-PSCs, with ongoing device testing. Notably, TPA-Sp-PE (8) and TPA-Sp-PA (9) SAMs achieved impressive PCE of 8.3% and 8.4%, respectively, comparable to the highest reported efficiency of 8.3% for TQxD-based Sn-PSCs. Further improvements are expected after device optimization.
Furthermore, UV-Vis and DPV measurements were conducted to understand the optical and electrochemical properties, including Eg and HOMO / LUMO, while thermal stability was measured via TGA and DSC. Single crystal XRD was utilized to study structural properties. These newly developed SAMs are currently undergoing device performance testing and optimization and expected to achieve enhanced efficiency. |
