塑料太陽能電池ppt課件-wenkub.com
2025-05-09 04:45 本頁面
【正文】 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。 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，則越容易實現(xiàn)電池大的開路電壓，但是會寬化禁帶寬度，導致對太陽光有效吸收的降低。 Wudl, F. Science 1992,258, 1474 BHJ 電池的優(yōu)點 ? First, the light absorption by anic semiconductors only produces excitons (tightly bound electronhole pairs), which need to travel to the DONOR–ACCEPTOR interface to separate into energycarrying charges. However, these excitons usually have a very short lifespan and a similarly short diffusion distance ( ≈ 10 nm). Thus, the minimized travel distance to the DONOR–ACCEPTOR interface rendered by the BHJ configuration is beneficial for efficient exciton dissociation. ? Second, the BHJ maximizes the interfacial area between the DONOR and the ACCEPTOR, and allows one to employ films of thicknesses much larger (typically 100–200 nm) than the exciton diffusion length ( ≈ 10 nm). A thick film can absorb more photons, thus more excitons can split into usable charges. ? Finally, the interperating work of the BHJ offers charge transport pathways to assist the charge collection at the electrodes. 光伏聚合物材料 三個發(fā)展階段 ? 第一階段： 1990s ? poly[2methoxy5(2 ′ ethylhexyloxy)1,4phenylenevinylene] (MEH–PPV) and (poly[2methoxy5(3,7dimethyloctyloxy)]1,4phenylenevinylene (MDMO–PPV)， 轉(zhuǎn)換效率最高達 %； ? 第二階段： 2022s ?
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