| Abstract: | 本研究以雙噻吩(Bithiophene, BT)及咪唑(Imidazole, Im)為核心，開發出5種電洞傳輸層材料以及5種界面層材料，應用於鈣鈦礦太陽能電池中，並依用途不同分為兩個系列。
第一系列開發出五種自組裝單分子膜材料(Self-Assembled Monolayer, SAM)分為兩個部分，首先以酯基、羧基化雙噻吩為核心，於單、雙側接上三苯胺，合成出三種小分子電洞傳輸層材料DEBT-2D (1)、DABT-2D (2)、DABT-1D (3); 第二部分則以酯基、羧基化雙噻吩(DEBT、DABT)為單體，分別與硫烷基化雙噻吩(SBT)單元進行聚合製備出DEBT-SBT (4)、DABT-SBT (5)等高分子材料，其中目前DEBT-2D (1)、DABT-2D (2) 、DEBT-SBT (4)、DABT-SBT (5) 與本實驗室材料DTP-HP作為Co-SAM應用在錫鈣鈦礦太陽能電池中光電轉換效率(PCE)分別有7.36%、7.36%、7.3%、7.3%，而DABT-1D (3)則是與TPAT-PA作為Co-SAM具 7.93% PCE。
第二系列則是用咪唑(Im)為核心，以噻吩及苯環延伸共軛，並以不同數量之FP當作外掛基團，分別合成出五種界面層材料，TFP-Im (6)、TFP-ImP (7)、TFP-ImT (8)、DFPIm-BT (9)、DFPIm-BP (10)。其中TFP-Im (6)和TFP-ImP (7)作為電洞傳輸界面層材料(HTIM)應用在鉛鈣鈦礦太陽能電池中PCE分別為21.05%、21%，而TFP-Im (8)當作電子傳輸界面層材料(ETIM) PCE 為21%，上述材料元件效能優化中。
;In this study, five hole transporting materials (HTM) and five interfacial materials (IM) were developed based on bithiophene (BT) and imidazole (Im) cores, respectively, and applied in perovskite solar cells. The materials are categorized into two series according to their intended functions.
The first series involves the development of five self-assembled monolayer (SAM) materials, which can be further divided into two categories. The first category features three small-molecular HTMs, i.e. DEBT-2D (1), DABT-2D (2), and DABT-1D (3) which using ester- and carboxylated functionalized bithiophene cores (DEBT or DABT) and end capping with mono- or di-substituted triphenylamine groups. The second series of HTM include two polymeric materials DEBT-SBT (4) and DABT-SBT (5) synthesized by polymerizing DEBT or DABT with thioalkylated bithiophene (SBT) unit. Among these, DEBT-2D (1), DABT-2D (2), DEBT-SBT (4), and DABT-SBT (5), when co-dyed with our DTP-HP in tin-based perovskite solar cells, demonstrated preliminary power conversion efficiencies (PCE) of 7.36%, 7.36%, 7.30%, and 7.30%, respectively. In contrast, DABT-1D (3) co-dyed with TPAT-PA achieved a preliminary PCE of 7.93%.
Five imidazole based interfacial materials (IM), i.e. TFP-Im (6), TFP-ImP (7), TFP-ImT (8), DFPIm-BT (9), and DFPIm-BP (10) were synthesized which were functionalized with varying numbers of fluorinated phenyl (FP) groups. TFP-Im (6) and TFP-ImP (7) was applied as hole transporting interfacial materials (HTIM) in lead-based perovskite solar cells and reached PCE of 21.05% and 21.0%, respectively. Meanwhile, TFP-Im (8), utilized as an electron transporting interfacial material (ETIM), exhibited PCE of 21.0%. Device optimization of these new materials is currently in progress |
