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yexuqing木蟲之王 (文學(xué)泰斗)
太陽(yáng)系系主任
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[交流]
Efficient perovskite/silicon tandem with asymmetric self-assembly molecule
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Efficient perovskite/silicon tandem with asymmetric self-assembly molecule 采用非對(duì)稱自組裝分子的高效鈣鈦礦/硅疊層電池 ▲ 作者:Lingbo Jia, Simeng Xia et al. ▲鏈接: https://www.nature.com/articles/s41586-025-09333-z ▲摘要: 研究人員設(shè)計(jì)了一種非對(duì)稱自組裝單分子層HTL201,其結(jié)構(gòu)特征為在咔唑核苯環(huán)側(cè)分別引入間隔基團(tuán)和膦酸錨定基團(tuán),作為鈣鈦礦/硅疊層太陽(yáng)能電池的空穴傳輸層。 與具有氮鍵合膦酸基團(tuán)的對(duì)稱自組裝單分子層相比,HTL201分子展現(xiàn)出更小的空間位阻效應(yīng),并在透明導(dǎo)電氧化物復(fù)合層上實(shí)現(xiàn)了更完整的覆蓋。HTL201與鈣鈦礦薄膜之間的強(qiáng)配位作用有效降低了埋底界面的非輻射復(fù)合損失。 值得注意的是,通過優(yōu)化鈣鈦礦與HTL201之間的能級(jí)排列,配合鈣鈦礦層準(zhǔn)費(fèi)米能級(jí)分裂值的提升,實(shí)現(xiàn)了鈣鈦礦/硅疊層太陽(yáng)能電池接近2伏的突破性電壓,基于硅異質(zhì)結(jié)電池的認(rèn)證功率轉(zhuǎn)換效率達(dá)到34.58%。 ▲ Abstract: Here we design an asymmetric self-assembled monolayer (named as HTL201) featuring an anchoring group and a spacer flanking a carbazole core, serving as a hole-selective layer for perovskite/silicon tandem solar cells. When compared with symmetric self-assembled monolayers with a nitrogen-bonded phosphonic acid group, the HTL201 molecule shows minimized steric hindrance and improved coverage on the transparent conductive oxide recombination layer. The strong coordination interaction between HTL201 and the perovskite film effectively reduces non-radiative recombination at the buried interface. Notably, the optimized energy-level alignment between the perovskite and HTL201, accompanied by an increase in the quasi-Fermi-level splitting value of the perovskite layer, enables an impressive voltage of nearly 2?V for perovskite/silicon tandem solar cells, resulting in a certified power conversion efficiency of up to 34.58% based on a silicon heterojunction solar cell. |

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