塑料太陽(yáng)能電池ppt課件-資料下載頁(yè)
2025-05-12 04:45本頁(yè)面
【正文】 –PPV) and (poly[2methoxy5(3,7dimethyloctyloxy)]1,4phenylenevinylene (MDMO–PPV)， 轉(zhuǎn)換效率最高達(dá) %； ? 第二階段： 2022s ? P3HT，轉(zhuǎn)換效率 ≈ 5%。 ? 第三階段：從 2022s后，過(guò)去幾年 ? 很多超過(guò) 7%，各種窄禁帶 DA聚合物或有機(jī)小分子 光伏聚合物材料 P3HT Chemical Structures of PC61BM and PC71BM Heeger ? 聚合物的禁帶寬度和 HOMO、 LUMO是影響電池性能的最重要的參數(shù)。 ? 太陽(yáng)中最大光子流的密度接近 700nm，對(duì)應(yīng)的最低能量約為 （一般的共軛聚合物的禁帶寬度都在 ）。 ? 合成窄禁帶寬度的共軛聚合物，使其吸收能覆蓋紅外和近紅外，同時(shí)具有大的消光系數(shù)非常重要。 Energy diagram of donor and acceptor HOMOLUMO levels showing three intercorrelated parameters. Eg is the band gap of the polymer, Ed （ or △ EED） is the LUMO energy difference inducing a downhill driving force for electron transfer, and Vb is the builtin potential which has a linear relationship with the opencircuit voltage. ? 給體材料的 HOMO越低，則越容易實(shí)現(xiàn)電池大的開(kāi)路電壓，但是會(huì)寬化禁帶寬度，導(dǎo)致對(duì)太陽(yáng)光有效吸收的降低。 ? 另外，給體材料的 LUMO能級(jí)至少要比受體材料 PCBM的 LUMO高 ，以保證有足夠的驅(qū)動(dòng)力，并可以克服激子之間的結(jié)合力，使電子順利流向受體。所以降低給體的 LUMO能級(jí)，窄化禁帶時(shí)，有可能會(huì)妨礙有效的電子轉(zhuǎn)移。 分子設(shè)計(jì) ? 要設(shè)計(jì)這樣的 p聚合物，一方面要盡量追求其具有低的禁帶寬度，同時(shí)要仔細(xì)地調(diào)整其 HOMO和 LUMO能級(jí)。 能帶工程 窄禁帶材料 Aromatic and quinoid resonance forms of poly(pphenylene),poly(pphenylenevinylene), polythiophene, and relative contribution of the mesomeric structures is represented by the size of the colored circles over the arrows Polyisothianaphthene，聚異硫茚 DA聚合物 窄禁帶材料 ? 調(diào)整禁帶寬度的另一個(gè)有效方法是將富電子（ D型）和缺電子（ A型）的單元交替鍵接在聚合物主鏈上，這時(shí)可以得到禁帶非常窄的聚合物 氫鍵使其共平面性更好 ITO/PEDOTPSS/PSBTBT:PCBM/Ca/Al Jianhui Hou, … and Yang Yang,J. AM. CHEM. SOC. 2022, 130, 16144–16145 PCE of up to % was observed under AM , 100 mW/cm2 illumination, and the response range of the device covers the whole visible range from 380 to 800 nm EHOMO= ELUMO= Eg= Jianhui Hou, … and Yang Yang,J . AM. CHEM. SOC. 2022, 131, 15586–15587(10月 ) ITO/PEDOTPSS/Polymer:PC70BM/Ca/Al The average PCE of the PBDTTTbased devices reached % with a champion PCE result of %. 材料老化與器件壽命問(wèn)題 Lifetime studies of modules Lifetime Studies of Large Area Modules: Influence of Temperature The stability is dependent on the temperature of the measurements： At 80 0C, the lifetime curve shows at first an improvement followed by exponential decay, and for temperatures at 50 0C the device performance decreases more slowly. Macromolecules, Vol. 43, No. 19, 2022 Photochemical Stability Evolution of PDTTDABTUVvisible absorbance spectrum upon photooxidation it is seen that photooxidation of PDTTDABT resulted in a gradual decay of the optical absorption between 300 and 800 nm. A blueshift of the absorption maximum。initially located around 610 nm。was also noticed, indicating a reduction of the πconjugation length ? To produce BHJ photovoltaic devices with PCEs exceeding 10% will certainly require efforts of an interdisciplinary approach. By integrating new advanced device concepts and the nanostructure engineering of the morphology, the future development of functional conjugated polymers will ensure their key role in bringing highefficiency and low cost plastic solar cells one step closer to successful mercialization. ——Heeger Thanks for your attention！
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