【摘要】：染料敏化太陽能電池(DSCs)中,高原天然染料敏化劑花青素由于分子中含有多個(gè)羥基基團(tuán),有助于其與TiO_2有效結(jié)合形成有效的電子注入通道,從而表現(xiàn)出優(yōu)異的性能,但同時(shí)由于遠(yuǎn)離二氧化鈦光陽極部分的羥基易吸收水分,容易增加電荷復(fù)合同時(shí)電池性能下降,因此本研究通過對花青素進(jìn)行化學(xué)改性來解決該問題。首先從高原金蓮花中提取天然染料,并通過紫外可見吸收光譜和紅外吸收光譜測試,確定所獲取的產(chǎn)物主要成分為花青素;在此基礎(chǔ)上對所獲得的花青素分子進(jìn)行化學(xué)改性,通過酯化反應(yīng)去除部分多余的羥基基團(tuán)。將所獲得的改性產(chǎn)物用于DSC中,相比于未改性的花青素敏化電池,光伏性能得到了明顯的改善,開路電壓提高了30 m V。
[Abstract]:In dye-sensitized solar cell (DSCs), anthocyanin, a natural dye sensitizer in plateau, has many hydroxyl groups in the molecule, which is helpful to form an effective electron injection channel by combining with TiO_2, thus showing excellent performance. But at the same time because the hydroxyl group which is far away from the titanium dioxide photoanode is easy to absorb water and the charge is increased and the performance of the battery is decreased the anthocyanin is chemically modified to solve the problem. At first, the natural dyes were extracted from the lotus flower of the plateau, and the main components of the obtained products were determined by UV-Vis absorption and infrared absorption spectra, and the anthocyanin molecules were chemically modified on this basis. Some excess hydroxyl groups were removed by esterification. Compared with the unmodified anthocyanin-sensitized cell, the photovoltaic performance of the modified product was obviously improved and the open circuit voltage was increased by 30 MV compared with the unmodified anthocyanin sensitized cell.
【作者單位】： 青海大學(xué);清華大學(xué)新型陶瓷與精細(xì)工藝國家重點(diǎn)實(shí)驗(yàn)室;青海民族大學(xué);青海黃河水電新能源分公司;
【基金】：國家自然科學(xué)基金(51362025) 青海省三江源項(xiàng)目(2010-N-S03) 青海省昆侖學(xué)者計(jì)劃 清華大學(xué)新型陶瓷與精細(xì)工藝國家重點(diǎn)實(shí)驗(yàn)室開放基金
【分類號】：TM914.4

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