分會

第二十九分會：有機/鈣鈦礦光伏材料與器件

摘要

將剪切沖量策略應用于大面積光伏模組制備，實現(xiàn)從小面積器件到環(huán)境友好型大面積有機光伏模組的轉(zhuǎn)變。通過控制旋涂時間和刮涂速度提高印刷過程中溶液所受到的剪切沖量，系統(tǒng)研究旋涂工藝和刮涂工藝下溶液剪切沖量對薄膜形貌和器件性能的影響，建立剪切沖量、活性層形貌和器件性能之間的關系。在PM6:Y6體系中，當刮涂速度為55 mm/s時，活性層薄膜得到最優(yōu)形貌，其光電轉(zhuǎn)換效率達到了15.1%。增加剪切沖量可有效抑制綠色溶劑中給體和受體的過度聚集，有利于器件中激子分離與電荷傳輸。同時，通過計算不同制備工藝下的剪切沖量，并對其相應活性層形貌進行研究，我們歸納總結(jié)出了形成均質(zhì)化有機活性層薄膜的臨界條件。此外，為了對剪切沖量策略的普適性進行驗證，我們制備了基于PM6:BTP-eC9體系的有機光伏器件。當器件有效面積為0.04 cm2時，其光電轉(zhuǎn)換效率為17.15%；在大面積有機光伏器件中，有效面積為1 cm2的剛性和柔性器件光電轉(zhuǎn)換效率分別為15.50%和13.26%，大面積模組(25 cm2)的光電轉(zhuǎn)換效率達到11.29%。 The shear impulse strategy is applied to the preparation of large-area photovoltaic modules to realize the transformation from small-area devices to eco-friendly large-area organic photovoltaic modules. By controlling the spin-coating time and blade-coating speed to improve the shear impulse of the solution during the printing process, we systematically study the effects of the shear impulse of the solution on the films morphology and devices performance under the spin-coating process and blade-coating process, and establish the relationship between the shear impulse, active layer films morphology and devices performance. For the OSCs based on the PM6:Y6 system, the power conversion efficiency (PCE) reached 15.1% at the blade-coating speed of 55 mm/s due to the fine-tuning of the active layer films morphology. The enhancement of the shear impulse effectively inhibits the aggregation of donors and acceptors in green solvents, which facilitates exciton separation and charge translocation of devices. Meanwhile, by calculating the shear impulse under different preparation processes and investigating the corresponding active layer films morphology, we summarized the critical conditions for the formation of homogenized films. Furthermore, in order to verify the universality of the shear impulse strategy, we prepared PM6:BTP-eC9-based organic photovoltaic devices. The PCE reached 15.50% and 13.26% for the large-area (1 cm2) rigid and flexible devices, respectively, and 11.29% for the large-area module (25 cm2).

關鍵詞

有機太陽電池;綠色印刷;剪切沖量策略;大面積模組

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