三元體異質(zhì)結(jié)有機(jī)太陽能電池的研究
發(fā)布時間：2018-08-12 15:16
【摘要】：礦物能源的過度開采和使用已經(jīng)給社會的發(fā)展帶來了一系列的問題,例如能源短缺,溫室效應(yīng),酸雨和霧霾等。有機(jī)太陽能電池是一種廉價的可再生能源,因其具有易制備,質(zhì)量輕,柔性和原材料豐富等優(yōu)點(diǎn)而受到了人們的廣泛關(guān)注。三元體異質(zhì)結(jié)有機(jī)太陽能電池通過在給受體主體系中摻雜近紅外窄帶隙材料,能夠擴(kuò)展有源層的吸收光譜的響應(yīng)范圍,從而提高有機(jī)太陽能電池的能量轉(zhuǎn)換效率,這成為了近期的一個研究熱點(diǎn)。本文分別研究了基于P3HT:PBDTTT-C:PC71BM體系和P3HT:DIB-SQ:PC71BM體系的三元體異質(zhì)結(jié)有機(jī)太陽能電池。 通過在P3HT:PC71BM體系中摻雜窄帶隙聚合物材料PBDTTT-C, P3HT:PC71BM二元體系的太陽能電池的性能得到了提升。當(dāng)PBDTTT-C的摻雜濃度為6wt%時,有機(jī)太陽能電池的能量轉(zhuǎn)換效率達(dá)到2.48%,比二元有機(jī)太陽能電池的性能提高了27%。有機(jī)太陽能電池能量轉(zhuǎn)換效率提升的主要機(jī)理可以歸因于通過在P3HT:PC71BM體系中摻雜PBDTTT-C,有源層的吸收光譜擴(kuò)展到了近紅外區(qū)域,平衡了光子的捕獲和載流子的傳輸。眾所周知,聚合物與聚合物混合的薄膜通常會出現(xiàn)宏觀尺度或微觀尺度的相分離,這不利于有機(jī)太陽能電池效率的提升。因此,在接下來的工作中我們研究了小分子材料DIB-SQ對P3HT:PC71BM體系太陽能電池性能的影響。通過摻雜1.2wt%的DIB-SQ,優(yōu)化后的P3HT:PC71BM體系太陽能電池的能量轉(zhuǎn)換效率從3.05%提升到3.72%,效率相應(yīng)的提升了22%。我們測量了P3HT, DIB-SQ和P3HT:DIB-SQ溶液在700nm處的時間分辨瞬態(tài)光致發(fā)光光譜。P3HT溶液的在700nm處的壽命為0.9ns, DIB-SQ的為4.9ns,而P3HT:DIB-SQ的混合溶液則為6.2ns,這證明了P3HT與DIB-SQ分子之間存在能量傳遞過程。圖41幅,表4個,參考文獻(xiàn)106篇。
[Abstract]:Overexploitation and use of fossil energy has brought a series of problems to the development of society, such as energy shortage, Greenhouse Effect, acid rain and haze. Organic solar cell is a kind of cheap renewable energy, which is widely concerned because of its advantages of easy preparation, light weight, flexibility and abundant raw materials. By doping NIR narrow-band gap materials into the donor host system, the ternary heterojunction organic solar cells can expand the response range of the absorption spectra of the active layer, thus improving the energy conversion efficiency of the organic solar cells. This has become a research hotspot in the near future. In this paper, ternary heterojunction organic solar cells based on P3HT:PBDTTT-C:PC71BM system and P3HT:DIB-SQ:PC71BM system are studied. The performance of solar cells doped with narrow band gap polymer PBDTTT-C and P3HT:PC71BM binary system was improved. When the doping concentration of PBDTTT-C is 6 wt%, the energy conversion efficiency of organic solar cells reaches 2.48, which is 27.7% higher than that of binary organic solar cells. The main mechanism of improving the energy conversion efficiency of organic solar cells can be attributed to the fact that by doping PBDTTT-C in the P3HT:PC71BM system, the absorption spectra of the active layer extend to the near infrared region, balancing the capture of photons and the transport of carriers. It is well known that polymer / polymer mixed films usually present phase separation at macro or micro scale, which is not conducive to the improvement of the efficiency of organic solar cells. Therefore, in the following work, we studied the effect of small molecular material DIB-SQ on the performance of P3HT:PC71BM solar cells. By doping 1.2 wt% DIB-SQ, the energy conversion efficiency of the optimized P3HT:PC71BM solar cells is raised from 3.05% to 3.72%, and the efficiency is increased by 22%. The time-resolved transient photoluminescence spectra of P3HT, DIB-SQ and P3HT:DIB-SQ solutions at 700nm. The lifetime of P3HT solution at 700nm is 0.9ns, that of DIB-SQ solution is 4.9ns, and that of P3HT:DIB-SQ mixed solution is 6.2ns. it is proved that there is an energy transfer process between P3HT and DIB-SQ molecules. There are 41 figures, 4 tables and 106 references.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM914.4
本文編號：2179452
[Abstract]:Overexploitation and use of fossil energy has brought a series of problems to the development of society, such as energy shortage, Greenhouse Effect, acid rain and haze. Organic solar cell is a kind of cheap renewable energy, which is widely concerned because of its advantages of easy preparation, light weight, flexibility and abundant raw materials. By doping NIR narrow-band gap materials into the donor host system, the ternary heterojunction organic solar cells can expand the response range of the absorption spectra of the active layer, thus improving the energy conversion efficiency of the organic solar cells. This has become a research hotspot in the near future. In this paper, ternary heterojunction organic solar cells based on P3HT:PBDTTT-C:PC71BM system and P3HT:DIB-SQ:PC71BM system are studied. The performance of solar cells doped with narrow band gap polymer PBDTTT-C and P3HT:PC71BM binary system was improved. When the doping concentration of PBDTTT-C is 6 wt%, the energy conversion efficiency of organic solar cells reaches 2.48, which is 27.7% higher than that of binary organic solar cells. The main mechanism of improving the energy conversion efficiency of organic solar cells can be attributed to the fact that by doping PBDTTT-C in the P3HT:PC71BM system, the absorption spectra of the active layer extend to the near infrared region, balancing the capture of photons and the transport of carriers. It is well known that polymer / polymer mixed films usually present phase separation at macro or micro scale, which is not conducive to the improvement of the efficiency of organic solar cells. Therefore, in the following work, we studied the effect of small molecular material DIB-SQ on the performance of P3HT:PC71BM solar cells. By doping 1.2 wt% DIB-SQ, the energy conversion efficiency of the optimized P3HT:PC71BM solar cells is raised from 3.05% to 3.72%, and the efficiency is increased by 22%. The time-resolved transient photoluminescence spectra of P3HT, DIB-SQ and P3HT:DIB-SQ solutions at 700nm. The lifetime of P3HT solution at 700nm is 0.9ns, that of DIB-SQ solution is 4.9ns, and that of P3HT:DIB-SQ mixed solution is 6.2ns. it is proved that there is an energy transfer process between P3HT and DIB-SQ molecules. There are 41 figures, 4 tables and 106 references.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM914.4
【參考文獻(xiàn)】
相關(guān)期刊論文 前1條
1 卓祖亮;張�？�;許曉偉;王健;盧麗芳;徐征;;退火處理提高P3HT:PCBM聚合物太陽能電池光伏性能[J];物理化學(xué)學(xué)報;2011年04期
，本文編號：2179452
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