Optical Phonon Effects in the Infra-red Spectrum of Acceptor Centres in Semiconducting Diamond

Electronic States of Boron and Phosphorus in Diamond

“…2) shows three main peaks at 304, 347 and 363 meV, in accordance with the previous experiments [4]. Lines above 363 meV are not resolved.…”

“…But this is in contradiction with the previous interpretations of the infrared spectra of the excited states in diamond [4,6,7,9,10]. In these papers, the main peaks observed are attributed to the splitting of the hydrogen-like 2p state.…”

“…3) at 370 meV, and a weak one around 374 meV. The line at 370 meV was also observed by infrared absorption on very weakly doped natural crystals [4,6]. These peaks are excitation lines of the acceptor-bound holes.…”

Characterizing Natural-Color Type IIb Blue Diamonds

“…Austin and Wolfe (1956) and Wedepohl (1957) found that their intensity is related to the concentration of neutral (i.e., uncompensated) boron acceptors. Smith and Taylor (1962) found that when the infrared spectrum was recorded at low temperature (−188°C), it was evident that these bands were composed of numerous sharp lines, the details of which are still not completely understood. The basic shape of this spectrum can be explained in terms of the energy-level diagram shown in figure A-2.…”

Semiconducting diamonds

“…Однако большую ширину нельзя объяснить наложением двух перекрывающихся [полос. Следует принять предположение, выска-занное авторами 33 , которые связали большую ширину полосы 0,304 эв с уменьшением времени жизни дырки на данных возбужденных уровнях. Дырка, возбужденная на уровень 0,304 эв, почти мгновенно переходит на другой уровень, переходы на которой из основного запрещены.…”