02013nas a2200169   4500008004100000022001400041245014100055210006900196260000800265300001400273490000700287520135100294100002701645700002201672700001901694856013001713       2018                        eng d  a2040-336400aRole of surface ligands in determining the electronic properties of quantum dot solids and their impact on photovoltaic figure of merits0 aRole of surface ligands in determining the electronic properties  cJAN  a1072-10800 v103 a<p>Surface chemistry plays a crucial role in determining the electronic properties of quantum dot solids and may well be the key to mitigate loss processes involved in quantum dot solar cells. Surface ligands help to maintain the shape and size of the individual dots in solid films, to preserve the clean energy band gap of the individual particles and to control charge carrier conduction across solid films, in turn regulating their performance in photovoltaic applications. In this report, we show that the changes in size, shape and functional groups of small chain organic ligands enable us to modulate mobility, dielectric constant and carrier doping density of lead sulfide quantum dot solids. Furthermore, we correlate these results with performance, stability and recombination processes in the respective photovoltaic devices. Our results highlight the critical role of surface chemistry in the electronic properties of quantum dots. The role of the size, functionality and the surface coverage of the ligands in determining charge transport properties and the stability of quantum dot solids have been discussed. Our findings, when applied in designing new ligands with higher mobility and improved passivation of quantum dot solids, can have important implications for the development of high-performance quantum dot solar cells.</p>1 aGoswami, Prasenjit, N.1 aMandal, Debranjan1 aRath, Arup, K.  uhttps://library.ncl.res.in/content/role-surface-ligands-determining-electronic-properties-quantum-dot-solids-and-their-impact