Photo-induced electron recombination dynamics in CdSe/P3HT hybrid heterojunctions.
نویسندگان
چکیده
Since the demonstration of efficient hybrid photovoltaic devices using CdSe/P3HT, a number of different QD/polymer molecular solar cells have been investigated. However, considerably less attention has been paid to the photo-induced processes occurring in these devices, in particular the strong dependence that device efficiencies show upon QD concentration. This study aims to shed more light on this dependence by monitoring these processes occurring at the QD/polymer interface, namely, exciton formation, charge separation and undesired charge recombination.
منابع مشابه
Influence of nanoparticle shape on charge transport and recombination in polymer/nanocrystal solar cells.
A key consideration for the efficient operation of hybrid solar cells based upon conjugated polymers and inorganic semiconductor nanocrystals is charge transport in the nanocrystal phase. Here we report the results of a study into the charge transport kinetics of polymer/nanocrystal solar cells based on blends poly(3-hexylthiophene) (P3HT) with either CdSe nano-dots or CdSe nano-tetrapods. Tran...
متن کاملInterfacial charge transfer dynamics in CdSe/dipole molecules coated quantum dot polymer blends.
We report our results on the influence of the dipole moment of small molecules anchored to the surface of CdSe nanocrystals, over the interfacial charge recombination dynamics in CdSe/P3HT (P3HT : poly-3-hexylthiophene). The polarizability of the CdSe/P3HT interface is key to achieving efficient charge separation and slow back electron transfer, two of the most important processes to boost the ...
متن کاملIn-situ growth of CdSe-P3HT nanocomposites
Introduction CdSe-P3HT (poly(3-hexylthiophene))) nanocomposites are studied for their application in hybrid solar cells. Semiconductor inorganic/organic hybrid solar cells offer many advantages relative to their non-hybrid counterparts. They have the advantages of conjugated polymers such as light weight, flexibility, abundance of resources, the potential for roll-to-roll and non-vacuum process...
متن کاملIn situ synthesis of P3HT-capped CdSe superstructures and their application in solar cells
Organic/inorganic hybrid solar cells have great potentials to revolutionize solar cells, but their use has been limited by inefficient electron/hole transfer due to the presence of long aliphatic ligands and unsatisfying continuous interpenetrating networks. To solve this problem, herein, we have developed a one-pot route for in situ synthesis of poly(3-hexylthiophene) (P3HT)-capped CdSe supers...
متن کاملExciton dynamics and device performance in polythiophene heterojunctions for photovoltaics
We present time-resolved photoluminescence studies in conjunction with device characterization of a variety of heterojunctions with poly-(3-hexylthiophene), or P3HT, as a means to understand how exciton dynamics affect device performance. We find that blends of P3HT with the electron-transporting polymer CN-ether-PPV and with the fullerene derivative PCBM result in ~4-fold and ~15-fold improvem...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Physical chemistry chemical physics : PCCP
دوره 11 42 شماره
صفحات -
تاریخ انتشار 2009