TECHNOLOGY FOCUS - BIOLOGY - Preferred Components: The photosynthetic organism is a purple bacterium, cyanobacteria, a green plant, or another similar photosynthetic organism.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The quantum dot comprises a cadmium selenium/zinc sulfide quantum dot and/or a cadmium tellurium quantum dot, where the quantum dot comprises a quantum dot fluorescent core. The quantum dots are bound to the reaction center through an electrostatic force, a molecular force, a hydrophobic force and/or a biolinker.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The semiconductor nanoparticle is suitable for an efficient FRET from the semiconductor nanoparticle to the photosynthetic unit. In the method, a photosynthetic center is capable of performing a process of sequential electron transfer. In the method, a Forster radii (RF) of (I) is larger than R(min) to ensure an efficient FRET of excitons from the semiconductor nanoparticle to the photosynthetic unit, where: the FRET efficiency (Eo) is equal to 1(1+(R/RF)6); R(min) is equal to (D(SN)+D(PU)/2); D(SN) is the diameter of the semiconductor material; and D(PU) is the diameter of the photosynthetic unit. The photosynthetic units and the semiconductor nanoparticles are present in a molar ratio that ensures that sufficient excitons are transferred from the semiconductor nanoparticles to the photosynthetic units. The molar ratio is sufficiently small so that A( lambda (exc)) is greater than 1, where: A is an enhancement factor; lambda (exc) is an excitation wavelength; A ( lambda (exc)) is equal to PL (hybrid)/PL(PU); PL(hybrid) is a photoluminescence peak intensity for the hybrid; and the PLPU is a photoluminescence peak intensity for the photosynthetic unit. The photosynthetic unit comprises at a chromatophore, a thylakoid, a chloroplast, or a reaction center (RC). The reaction center comprises one or more quinones, where RC is capable of sequential electron transfer. The first aqueous solution further comprises a compound capable of being an electron donor (the electron donor compound). The electron donor compound keeps the quinones fully reduced and the reaction center photochemically inactive. The electron donor is an electron donating dye and/or an electron donating compound. The electron donating compound is a condensed polycyclic compound, an amine compound, a quaternary amine compound, an aniline derivative, a nitrogen-containing heterocyclic compound, a sulfur-containing heterocyclic compound, an oxygen-containing heterocyclic compound, a nitrogen- and oxygen-atom containing heterocyclic compound, a nitrogen- and sulfur-atom containing heterocyclic compound, an oxygen-and sulfur-atom containing heterocyclic compound or a sulfur-, nitrogen- and oxygen-atom containing heterocyclic compound, preferably sodium ascorbate. The RC is stable against photooxidation. The second aqueous solution further comprises one or more stabilizing agents. The stabilizing agent forms a coating around the semiconductor nanoparticle to stabilize and solubilize the semiconductor nanoparticle in the second aqueous solution. In the method, the thickness of the coating is suitable to ensure that the FRET of exciton from the semiconductor nanoparticle to the photosynthetic unit is efficient. The stabilizing agent is a mercapto-compound and/or another similar stabilizing molecule. The mercapto compound is a thio-containing polyethylene glycol molecule, a cysteine moiety and/or a thioglycolic acid. The fluorescent wavelengths of the semiconductor nanoparticles are sufficiently overlapped with absorption wavelengths of the photosynthetic unit to ensure an efficient FRET of excitons from the semiconductor nanoparticles to the photosynthetic units. The photosynthetic unit comprises at least one RC, where the reaction center comprises one or more quinones, and the RC is capable of sequential electron transfer. The semiconductor nanoparticle comprises a quantum dot (11), a nanowire and/or a nanorod. The second aqueous solution further comprises a linking agent, where the linking agent becomes a biolinker when the hybrid is formed. In the method, a length of the biolinker is suitable for FRET of excitons from the quantum dot to the reaction center. The linking agent is a compound containing a carbodiimide functional group of formula (RN=C=NR) (the carbodiimide compound). The linking agent is the stabilizing agent. The carbodiimide compound assists in forming a covalent bond between the quantum dot and the reaction center. The binding of the quantum dot to the reaction center is shown by a reduction in peak intensities of exciton emissions of the quantum dot when the hybrid is formed. The semiconductor nanoparticles are bound to one or more sites of the photosynthetic unit, where the sites comprise electron donor sites, electron acceptor sites, or both. The FRET of exciton occurs when peak intensities of exciton emission of the semiconductor nanoparticle are reduced when the semiconductor nanoparticle is suitably bound to the photosynthetic unit. The semiconductor nanoparticle is bound to the photosynthetic unit through an electrostatic force, a molecular force, hydrophobic force and/or the biolinker. The biolinker is a bifunctional connecting molecule. The biolinker comprises a carbodiimide group, a carboxylic group and/or an amino group. The biolinker assists in forming one more covalent bonding between the semiconductor nanoparticle and the photosynthetic unit. The semiconductor nanoparticle has a diameter of 2-20 nm. The reaction center is kept photochemically inactive by one or more electron donor compounds, where the electron donor compound also keeps the quinones of the reaction center fully reduced.R = carboxylic function group and/or an amino function group. EXAMPLE - Cells of wild-type non-sulfur purple bacterium Rhodobacter sphaeroides were grown in liquid Ormerod culture medium under anaerobic conditions at 30 degrees C for 4-6 days. Chromatophores (membranes containing photo synthetic apparatus) were isolated from sonicated cells and were incubated in the dark for 30 minutes at 4 degrees C in 0.01 M sodium phosphate buffer (pH 7) containing 0.5% of zwitterion detergent lauryl dimethylamine oxide (LDAO). After, the chromatophore suspension (144000 g) was centrifuged for 60 minutes at 4 degrees C. The supernatant was brought to 22% of saturation with a solution of ammonium sulfate. The precipitate containing reaction center (RC) was dissolved in 0.01 M sodium phosphate buffer (pH 7.2) containing 0.05% of LDAO. The resulting RC was suspended in 0.01 M sodium phosphate buffer (pH 7.2) containing 0.05% LDAO and dialyzed against 0.01 M tris(hydroxymethyl)aminomethane-hydrochloride buffer (pH 7.8) containing 0.1% anionic detergent sodium cholate and worked up to give purified RC. Cadmium telluride quantum dot (QD) was capped with a stabilizer and thioglycolic acid. The cadmium selenium/zinc sulfide QD was added with a zinc sulfide shell and treated with DL-cysteine or solubilized in aqueous solutions using the mixture of three-functional thiol-containing polyethyleneglycol molecules terminated by the carboxylic or hydroxyl groups. The mixtures of the polymers for QD solubilization were adjusted to provide binding affinity of QD with the RC. The QD was treated with low molecular weight mercapto-compounds (e.g. with DL-cysteine), the water-soluble cadmium selenium/zinc sulfide QD of the smallest possible diameters. QD was controlled with zeta potential of their surfaces and was assembled with the RC. The assembling procedure was controlled by analysis of quenching of the QD fluorescence. QD-RC assemblies were prepared in the 10 mM of sodium-ascorbate buffer (pH 6.8) by adding RC (2.1 mu l) to 0.5 mu M QD (497.9 mu l) solution in water to obtain 500 mu m of the reaction mixture. The QD-RC complexes were further purified with a Superdex 200 (RTM: Resin) and 10 mM of sodium-ascorbate buffer (pH 6.8) to give QD-RC hybrid.