tailieunhanh - Báo cáo hóa học: " Preparation of SnS2 colloidal quantum dots and their application in organic/inorganic hybrid solar cells"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Preparation of SnS2 colloidal quantum dots and their application in organic/inorganic hybrid solar cells | Tan et al. Nanoscale Research Letters 2011 6 298 http content 6 1 298 o Nanoscale Research Letters a SpringerOpen Journal NANO EXPRESS Open Access Preparation of SnS2 colloidal quantum dots and their application in organic inorganic hybrid solar cells Furui Tan1 Shengchun Qu1 Ju Wu1 Kong Liu1 Shuyun Zhou2 and Zhanguo Wang1 Abstract Dispersive SnS2 colloidal quantum dots have been synthesized via hot-injection method. Hybrid photovoltaic devices based on blends of a conjugated polymer poly 2-methoxy-5- 3 7 dimethyloctyloxy -1 4-phenylenevinylene MDMO-PPV as electron donor and crystalline SnS2 quantum dots as electron acceptor have been studied. Photoluminescence measurement has been performed to study the surfactant effect on the excitons splitting process. The photocurrent of solar cells with the hybrid depends greatly on the ligands exchange as well as the device heat treatment. AFM characterization has demonstrated morphology changes happening upon surfactant replacement and annealing which can explain the performance variation of hybrid solar cells. Introduction Organic-inorganic hybrid bulk-heterojunction BHJ solar cell is an interesting alternative to the all-organic solar cells with replacement of the organic n-type material with inorganic nano-particles NPs . This new kind of solar cell aims at combining the solution processability of conjugated polymers with high electron mobility and the relative environmental stability of inorganic semiconductors. Up to now various NPs such as CdSe 1-3 PbS 4 TiO2 5 ZnO 6 or heterojunction nano-crystals 7-9 have been applied in organic-inorganic BHJ solar cells. The best solar cell adopting inorganic nano-phase as the electron acceptor demonstrated a power conversion efficiency exceeding 3 using CdSe tetrapods 3 . However compared with this toxic material a nontoxic environmental-friendly alternative may be more attractive in the future application of this kind of cells. Tin disulfide SnS2 is a .