【摘要】：目前,硅基電池占據(jù)太陽能電池市場主要地位。但其價格高、缺乏柔性和透明等缺點,限制了其應(yīng)用領(lǐng)域。有機太陽能電池作為新型太陽能電池的一種,具有價格低廉、質(zhì)地輕、柔性等特點,并且效率已突破11%,具有商業(yè)應(yīng)用前景。但由于有機半導(dǎo)體材料存在激子擴散距離短,載流子遷移率低,限制了有機活性層厚度,導(dǎo)致無法充分吸收太陽光,限制了有機太陽能電池光電轉(zhuǎn)換效率(PCE)的提高。貴金屬表面等離子體共振(LSPR)效應(yīng)已被證實是提高有機半導(dǎo)體薄膜光吸收率的一種行之有效的辦法,但缺乏提升電池效率和穩(wěn)定性的有效策略。本論文基于AgAl合金和金表面等離子體共振效應(yīng),并結(jié)合界面修飾技術(shù),對提升電池的光電轉(zhuǎn)換效率和穩(wěn)定性進行了較深入研究。具體內(nèi)容如下:(1)通過熱蒸鍍法在MoO_3中插入AgAl和Ag納米結(jié)構(gòu),通過調(diào)節(jié)MoO_3隔離層厚度和蒸鍍Ag和AgAl名義厚度優(yōu)化AgAl和Ag納米結(jié)構(gòu)和尺寸,以便有效調(diào)節(jié)其等離子體效應(yīng)和提升聚合物太陽能電池性能。研究表明:空穴傳輸層結(jié)構(gòu)為Mo0_3(8 nm)/AgAl(3nm)/MoO_3(1 nm)的太陽能電池獲得9.79%效率,明顯高于Ag結(jié)構(gòu)的參比電池效率8.55%。采用1 nm厚MoO_3隔離層,能有效控制Ag納米結(jié)構(gòu)的表面等離子體共振效應(yīng)。采用AgAl合金納米結(jié)構(gòu)的電池,經(jīng)120天老化實驗后效率仍保留原來的60%,而采用Ag納米結(jié)構(gòu)電池效率經(jīng)120天衰減到原來的26%,因此,AgAl結(jié)構(gòu)的電池穩(wěn)定性有明顯提升。(2)通過熱蒸鍍法在MoO_3/AgAl/MoO_3結(jié)構(gòu)里進一步摻入Au納米結(jié)構(gòu),通過優(yōu)化MoO_3隔離層厚度,實現(xiàn)了 Ag和Au納米結(jié)構(gòu)的表面等離子體共振的協(xié)同效應(yīng),擴展了光活性層的光吸收效果。將ZnO電子傳輸層替換為AZO,采用空穴傳輸層結(jié)構(gòu)為MoO_3(8 nm)/AgAl(3 nm)/Au(1 nm)/MoO_3(2 nm)的電池光吸收進一步增強,電池效率可達到10.30%。
[Abstract]:At present, silicon-based cells occupy a major position in the solar cell market. However, its high price, lack of flexibility and transparency and other shortcomings limit its application field. As a new type of solar cells, organic solar cells have the characteristics of low price, light quality, flexibility, etc. However, due to the short distance of exciton diffusion and low carrier mobility in organic semiconductor materials, the thickness of the organic active layer is limited, which leads to the inability to fully absorb solar light and limits the improvement of photovoltaic conversion efficiency (PCE) of organic solar cells. The surface plasmon resonance (LSPR) effect of noble metals has been proved to be an effective method to improve the photoabsorption of organic semiconductor films, but it lacks an effective strategy to improve the efficiency and stability of the cells. Based on the AgAl alloy and gold surface plasmon resonance (SPR) effect and the interfacial modification technique, the photovoltaic conversion efficiency and stability of the battery were studied in this paper. The main contents are as follows: (1) AgAl and Ag nanostructures were inserted into MoO_3 by thermal evaporation, and the nanostructures and sizes of AgAl and Ag were optimized by adjusting the thickness of MoO_3 isolation layer and the nominal thickness of MoO_3 and Ag and AgAl. In order to effectively adjust its plasma effect and improve the performance of polymer solar cells. The results show that Mo0_3 (8 nm) / AgAl (3nm) / Moo _ 3 (1 nm) solar cells have 9.79% efficiency, which is significantly higher than that of Ag reference cells (8.55%). The surface plasmon resonance (SPR) effect of Ag nanostructures can be effectively controlled by 1 nm thick MoO_3 insulator. The battery with AgAl alloy nanostructure, After 120 days of aging experiment, the efficiency of Ag nanostructure battery was reduced to 26% after 120 days of aging experiment. Therefore, the stability of Ag-Al structure was improved obviously. (2) the stability of MoO_3/AgAl/MoO_3 structure was further improved by thermal evaporation method. Doped with au nanostructures, By optimizing the thickness of MoO_3 isolation layer, the synergistic effect of surface plasmon resonance of Ag and au nanostructures was realized, and the photoabsorption effect of the photoactive layer was expanded. The ZnO electron transport layer was replaced by AZO, and the photoabsorption of MoO_3 (8 nm) / AgAl (3 nm) / au (1 nm) / Moo 3 (2 nm) was further enhanced, and the cell efficiency was 10.30 nm.
【學(xué)位授予單位】：華東師范大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM914.4

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相關(guān)期刊論文 前1條

1 孟祥悅;蔣禮;舒春英;王春儒;;聚合物太陽能電池中富勒烯受體材料研究進展[J];科學(xué)通報;2012年36期

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本文編號：2157731